* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Analysis of carbohydrates and glycoconjugates by
Survey
Document related concepts
Transcript
ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES BY MATRIX-ASSISTED LASER DESORPTION/IONIZATION MASS SPECTROMETRY: AN UPDATE FOR THE PERIOD 2005–2006 David J. Harvey* Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford OX1 3QU, UK Received 01 December 2008; received (revised) 26 June 2009; accepted 13 July 2009 Published online 10 March 2010 in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/mas.20265 This review is the fourth update of the original review, published in 1999, on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2006. The review covers fundamental studies, fragmentation of carbohydrate ions, method developments, and applications of the technique to the analysis of different types of carbohydrate. Specific compound classes that are covered include carbohydrate polymers from plants, N- and O-linked glycans from glycoproteins, glycated proteins, glycolipids from bacteria, glycosides, and various other natural products. There is a short section on the use of MALDITOF mass spectrometry for the study of enzymes involved in glycan processing, a section on industrial processes, particularly the development of biopharmaceuticals and a section on the use of MALDI–MS to monitor products of chemical synthesis of carbohydrates. Large carbohydrate–protein complexes and glycodendrimers are highlighted in this final section. # 2010 Wiley Periodicals, Inc., Mass Spec Rev 30:1–100, 2011 Keywords: MALDI; carbohydrates; glycoproteins; glycolipids I. INTRODUCTION This review is a continuation of the four earlier ones in this series (Harvey, 1999, 2006, 2009) on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and is intended to bring the coverage of the literature to the end of 2006. MALDI continues to be a major technique for the analysis of carbohydrates although electrospray is becoming increasingly popular. Figure 1 shows the year-byyear increase in articles reporting use of MALDI for the period 1991–2006. As the review is designed to complement the earlier work, structural formulae, etc. that were presented earlier are not repeated. However, a citation to the structure in the earlier work is indicated by its number with the prefix ‘‘1’’ (i.e., 1/x refers to structure x in the first review and 2/x to the second). Other reviews and review-type articles directly concerned with, or including MALDI analysis of glycoconjugates to have been published during the review period include general reviews on miniaturized separation techniques including LC/MALDI-TOF/TOF ———— *Correspondence to: David J. Harvey, Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford OX1 3QU, UK. E-mail: [email protected] Mass Spectrometry Reviews, 2011, 30, 1– 100 # 2010 by Wiley Periodicals, Inc. (Mechref & Novotny, 2006), solid-phase tools such as microarrays (Larsen et al., 2006), capillary electrophoresis-MS (Campa et al., 2006; Huck et al., 2006), atmospheric pressure MALDI (Creaser & Ratcliffe, 2006). More specific reviews include those on the analysis of polysaccharides (Cui, 2005), glycoproteins and attached glycans (Aitken, 2005; Morelle & Michalski, 2005; Budnik, Lee, & Steen, 2006; Geiser, Silvescu, & Reinhold, 2006; Geyer & Geyer, 2006; Harvey, Dwek, & Rudd, 2006; Haslam, Khoo, & Dell, 2006a; Haslam, North, & Dell, 2006b; Kondo et al., 2006; Morelle et al., 2006a), N- (Harcum, 2005; Harvey, 2005d,e; Medzihradszky, 2005; Bardor et al., 2006; Jang-Lee et al., 2006) and O-linked (Peter-Katalinic, 2005) glycosylation, bacterial glycoproteomics (Hitchen & Dell, 2005), protein glycation (Lapolla et al., 2006; Niwa, 2006; Silván et al., 2006), GPI anchors (Baldwin, 2005), proteoglycans (Didraga, Barroso, & Bischoff, 2006), glycosylaminoglycans (Gama & Hsieh-Wilson, 2005; Pojasek, Raman, & Sasisekharan, 2005; Sasisekharan et al., 2006), glycosphingolipids (Levery, 2005; Zheng, Wu, & Hancock, 2006b), and flavonoids (de Rijke et al., 2006). The book on mass spectrometry in biophysics by Kaltashov and Eyles (2005) also contains information. II. THEORY Knochenmuss (2006) has summarized ion formation mechanisms in UV MALDI and emphasized that a two-step mechanism of ionization during or shortly after the laser pulse, followed by secondary reactions in the expanding plume of desorbed material is gaining acceptance. He concludes by saying that: ‘‘To the extent that local thermal equilibrium is approached in the plume, the mass spectra may be straightforwardly interpreted in terms of charge transfer thermodynamics.’’ Gas-phase cationization has been demonstrated in an experiment in which two target spots were prepared and illuminated simultaneously with the laser. One spot contained polyethylene glycol (PEG) and dihydroxybenzoic acid (DHB, 1/26), whereas the other contained DHB and lithium hydroxide. Even though the PEG and lithium did not come into contact on the target, [M þ Li]þ ions were observed in the spectrum. However, because of difficulties in removing residual Naþ and Kþ from the DHB, the authors could not conclude that gas-phase cationization was the only or major process operating under normal MALDI conditions (Erb, Hanton, & Owens, 2006). & HARVEY A. High-Pressure and Atmospheric Pressure MALDI (AP-MALDI) Atmospheric pressure MALDI produces ions with less internal energy than vacuum MALDI and has been used to produce spectra of sialylated N- and O-linked glycans and gangliosides without substantial loss of the sialic acid that is a regular feature of vacuum MALDI (Zhang, Fu, & Ning, 2005a). A mixture of DHB and 2,5-dihydroxyacetophenone (DHA, 1/43) was used as the matrix and spectra were recorded with an FT-ICR mass spectrometer. IV. MATRICES A. Theory of Matrix Action FIGURE 1. Number of articles published on the application of MALDI–MS to carbohydrate research by year. Sodium cation affinities of hydroxybenzoic acid isomers have been published (Chinthaka et al., 2006). In general the most stable binding conformations involved formation of a hexacyclic chelation ring involving the carboxyl carbonyl group and a hydroxy group in the 2-position. Proton affinities and gas-phase basicities for the DHB isomers have been calculated using density functional theory and shown to be in good agreement with values obtained by FT-ICR (Rebber et al., 2006). Mesaros et al. (2006) have studied the photophysics of common MALDI matrices and found that 2,4,6-trihydroxyacetophenone (THAP, 1/44) and DHB release heat to the medium more efficiently than matrices such as harmane (1/34) and nor-harmane (1/35) and behave as ‘‘hotter’’ matrices. The observation that thin MALDI samples can perform differently than thicker samples on metal substrates has been investigated by Knochenmuss, McCombie, and Faderl (2006) for three electrosprayed matrixes, DHB, sinapinic acid (SA, 1/48), and a-cyano-4-hydroxycinnamic acid (CHCA, 1/23), on stainless steel and gold substrates. Thin sample enhancement was found in both polarities for all three matrices on a steel substrate. On gold, only CHCA showed enhancement. Two models were used to evaluate the data. The first was based on one-photon photoelectron emission from the metal, and the second on twophoton matrix ionization at the metal interface. The surfaceenhanced matrix photoionization model best fitted the evidence, including the fluence-dependence of electron emission from DHB on steel. III. INSTRUMENTATION A pyroelectric lead–lanthanum–zirconate–titanate ceramic plate has been developed as a MALDI target which allows spectra of thermally unstable compounds such as carbohydrates to be obtained without the use of a matrix (Sato et al., 2005). a(4/24) and b-cyclodextrins (4/6) in the presence of sodium iodide gave strong [M þ Na]þ ions with no sign of fragmentation. 2 Although incorporation of the analyte into the crystal has been thought to be necessary for the MALDI process to occur, a recent study has shown that this probably is not the case and that intimate contact between analyte and the crystal surface is more important. The study showed that the strength of the MALDI signal was approximately inversely proportional to crystal size suggesting that contact between the analyte and the matrix surface was more important (Trimpin, Räder, & Müllen, 2006). B. Simple Matrices 2-[(2E)-3-(4-tert-butylphenyl)-2-methylprop-2-enylidene]malononitrile (DCTB, 1) has been shown to be an effective matrix for hydrophobic compounds but less so for compounds soluble in water. Nevertheless, derivatized sugars and glycosides could be induced to fly with the formation of the normal [M þ metal]þ ions (Wyatt, Stein, & Brenton, 2006). Pencil ‘‘lead’’ (a mixture of graphite, clay, and waxes) has been shown to be an effective matrix for several types of compound including cyclodextrin. The matrix has the advantage of the absence of low mass matrix ions that characterize the spectra recorded from most other matrices making it ideal for small molecules although carbon clusters are often seen and, depending on the pencil, various constituents of the ‘‘lead’’ can give signals (Black et al., 2006). Carbon nanotubes were reported in 2003 as effective matrices for carbohydrates (Xu et al., 2003). However, a problem was keeping them on the MALDI target. This problem has been solved by attaching them to the target with polyurethane adhesive prior to adding the glycan solution (Ren et al., 2005). This procedure retained the property of the matrix to produce signals without the low-mass matrix ions. Oxidized carbon nanotubes have been reported to give better results than carbon nanotubes themselves because of their greater solubility in water (Pan et al., 2005). They have been used to record MALDI spectra from honeysuckle constituents (Chen et al., 2006c). Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Schulz et al. (2006) have compared the degree of analyte fragmentation in AP-MALDI as a function of the matrix and laser fluence. Several analytes were employed and the matrix hardness/softness was found to be consistent when comparing the analytes. The consensus ranking from hardest to softest was: CHCADHB>SA THAP > 6-azo-2-thiothymine (ATT, 1/45) > hydroxypicolinic acid (HPA, 1/60) although the exact ranking could be fluence dependent. Of several matrix properties, sublimation or decomposition temperature (determined using thermogravimetry), analyte initial velocity, and matrix proton affinity, the best correlation was found with the matrix proton affinity. & liquid matrices 1-methylimidazolium (4 þ 1/23) a-cyano-4hydroxycinnamate and tetrabutylammonium (Bu4N þ 1/26) 2,5-dihydroxybenzoic acid have produced signals from sucrose octasulfate (5) and an octasulfated pentasaccharide as their sodium salts. No ion pairing was necessary but some loss of sulfate was seen (Laremore et al., 2006). C. Binary Matrices Lewandrowski, Resemann, and Sickmann (2005) have noted that a mixed matrix of DHB and ATTwas useful in reducing in-source fragmentation of sialylated glycans. A novel MALDI matrix consisting of DHB and aniline has been reported to produce a significant increase in signal for N-linked glycans compared with the signal obtained with DHB alone (Snovida, Chen, & Perreault, 2006). The presence of aniline produced an on-target derivatization of the glycans via Schiff base formation with the reducing end GlcNAc residue without the need for prolonged incubation periods and elevated temperatures. The reaction appeared to be occurring slowly even after the sample-matrix spot had dried and could be used to differentiate glycans and peptides because the latter compounds did not react. The use of added quaternary ammonium or phosphonium salts to matrices has allowed fragile sulfated and sialylated carbohydrates to be analyzed without decomposition. For sulfates such as heparin disaccharide (a-DUA-2S(1 ! 4)GlcNS-6S), the combination of 2-amino-5-nitropyridine (2/20) and tetraphenylphosphonium bromide (2) gave the best results. Signals were produced both in positive and negative ion modes. In positive ion mode, species such as [M þ Pnþ1]þ were observed where n ¼ the number of acid groups. For sialylated glycans such as gangliosides, a combination of THAP with dimethylpalmitylammonium bromide (3) was the system of choice (Ueki & Yamaguchi, 2005). E. Negative Ions from Neutral Glycans In general, neutral carbohydrates do not give negative ions with the common matrices such as DHB. However, they can be made to form adducts with anions such as chloride with b-carboline matrices, such as nor-harmane (1/35) if ammonium chloride is added (Suzuki, Yamagaki, & Tachibana, 2006). These authors (Suzuki, Yamagaki, & Tachibana, 2005) have also used ammonium chloride with a harmine (1/36) matrix to produce [M þ Cl] ions and noted that the best results were obtained when the ammonium chloride was added in the same amount as the matrix. A layered target consisting of matrix, analyte and additive gave the best results. Although addition of salts is usually detrimental to signal strength in positive ion mode, the authors of this work report that the ionization efficiency for the production of [M þ Cl] ions increases in the presence of an excess of ammonium chloride. Laštovicková and Chmelı́k (2006) have obtained negative ion spectra of carbohydrates such as inulin (6) directly from the five matrices DHB, THAP, CHCA, 3-aminoquinoline (3-AQ, 1/24) and HABA. Of these, THAP was by far the best. 3-AQ gave a spectrum displaying smaller carbohydrates. Spectra were recorded with a 4700 TOF/TOF instrument. Carbohydrates such as inulin without a reducing terminus gave [M H] ions but reducing sugars could be identified by formation of an [M-120] ion as the result of a cross-ring fragmentation. D. Liquid Matrices Two reviews on ionic liquid matrices have appeared (Koel, 2005; Tholey & Heinzle, 2006) and two other more general reviews (Jain et al., 2005; Liu, Jönsson, & Jiang, 2005) have included their use. Although polysulfated sugars usually do not give signals under conventional MALDI conditions, the Mass Spectrometry Reviews DOI 10.1002/mas 3 & HARVEY V. DERIVATIVES Derivatization of carbohydrates, mainly of the reducing terminal by reductive amination, has been reviewed (Anumula, 2006). A. Reducing Terminal Derivatives Sekiya et al. (2005b) have reported that N-linked glycans, when derivatized with 2-aminpyridine (2-AP, 1/52) but not with 2aminobenzamide (2-AB, 1/56) and when ionized from DHB, produce, in addition to the normal [M þ Na]þ ions, additional [M þ H]þ ions that are accompanied by another ion two mass units higher. This apparently reduced product does not accompany the [M þ Na]þ ion, is not seen with nor-harmane as the matrix or on electrospray ionization. However, the abundance of the [M þ H þ H2]þ ion was enhanced when the reductive matrix 1,5-diaminonaphthalene (1/70) was used. The authors proposed, on the basis that all ions in the MS/MS spectra were shifted by two mass units from their positions in the spectra of the [M þ H]þ ions, that the reaction involved reduction of the pyridine ring of the 2-AP derivative. A comparison of ions formed by three different derivatives have shown that 2-AB and phenylhydrazone derivatives produced [M þ Na]þ under MALDI conditions whereas 1phenyl-3-methyl-5-pyrazolone (PMP, 7) produced a mixture of [M þ Na]þ, [M þ H]þ and [M H þ 2Na]þ ions. Phenylhydrazones and PMP derivatives produced more abundant cross-ring cleavage ions in the PSD spectra of complex glycans whereas, for high-mannose glycans, more informative spectra were provided by the 2-AB derivatives and phenylhydrazones (Lattová et al., 2005). Formation of phenylhydrazones, either ‘‘in-tube’’ or on the MALDI target has been reported to improve detection of released glycans in the presence of peptides (Lattová et al., 2006). The spectra of a mixture of these compounds showed both an increase in the signal from the glycans and a decrease in the abundance of the peptide signals. A multifunctional tag combining UV activity with bioaffinity has been described (Hsu, Chang, & Franz, 2006). The tag (8) was synthesized by activating biotin (9) with 1,10 -carbonyl diimidazole and coupled to one of the aminomethyl groups of xylylenediamine. The other amino group was available for reductive amination of the carbohydrate. The tag was used for labeling linear oligosaccharides, milk sugars, and high-mannose glycans from ribonuclease B. Quaternization of the amino group with methyl iodide gave a positively charged species and an increase in sensitivity of 10-fold such that amounts as little as 100 fmol on-probe could be detected. The presence of the tag did not affect fragmentation which occurred by cleavage of the sugar. 4 Xia et al. (2005a) have derivatized a range of glycans with 2,6-diaminopyridine (10) by reductive amination to give a fluorescent derivative with a free amino group that could be conjugated with a range of other compounds such as Nhydroxysuccinimide-activated glass slides, maleimide-activated proteins, carboxylated microspheres and biotin (10). Products were ionized by MALDI-TOF–MS. A method for removing the derivative from reductively aminated glycans has been reported and involves incubation at 308C with a solution of hydrogen peroxide/acetic acid. Recoveries were in the region of 90% (Suzuki, Fujimori, & Yodoshi, 2006). B. Reducing-Terminal Derivatives Prepared by Other Methods N-glycans are released with protein-N-glycosidase F (PNGase F) as glycosylamines that are rapidly hydrolyzed to the native sugars, particularly at low pH. Consequently, if the reaction is performed rapidly, they can be labeled by reaction with carbonyl compounds in what is essentially the reverse of the normal reductive amination procedure. Kamoda et al. (2005) have made use of this reaction to prepare in situ Fmoc derivatives by reaction with 9-fluorenylmethyl chloroformate (11) which they claim gave a fivefold increase in fluorescence detection compared with 2-aminobenzoic acid (2-AA, 1/57) derivatives. Furthermore, the free sugars could be recovered by incubation with morpholine in dimethylformamide. The derivatives gave good MALDI-TOF spectra from DHB. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES C. Derivatives of Other Sites A solid-phase method for permethylation of small amounts of carbohydrates has been developed and consists of microcolumns packed with sodium hydroxide powder through which is passed a solution of the carbohydrates in DMSO containing traces of water. Effective permethylation was reported to take less than 1 min and both oxidative degradation and peeling reactions were minimized. The need for excessive clean-up was also avoided although the glycans had to be separated from the DMSO with chloroform in the conventional manner. MALDI-TOF spectra were then obtained directly from DHB (Kang et al., 2005). Permethylation of carbohydrates frequently produces compounds 30 mass units higher than that of the product which, until now have not been characterized. These compounds have now been identified as containing a methoxy-methyl group in place of one of the methyl groups, its source being reaction with iodomethyl methyl ether produced as a by-product of the methylating reagents (Robinson, Routledge, & Thomas-Oates, 2005). Permethylation in general has been reviewed by Ciucanu (2006). The problem of signal suppression of small glycopeptides in the presence of larger peptides has been successfully addressed by formation of derivatives with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC). Glycopeptides from human antithrombin, chicken ovalbumin, and bovine a1-acid glycoprotein could be detected in low fmol amounts (Ullmer, Plematl, & Rizzi, 2006). Sialic acids have been stabilized for MALDI analysis by conversion to amides by reaction with ammonium bicarbonate/ ammonium chloride in the presence of 4-(4,6-dimethoxy-1,2,3triazil-2-yl)-4-methylmorpholinium chloride (DMT-MM, 12) for 24 hr at 508C (Sekiya, Wada, & Tanaka, 2005). Masses were 1 unit/sialic acid less than those of the underivatized molecules and their MS/MS spectra (positive ion) were very informative with a wealth of B- and Y-type glycosidic cleavage products. Methyl ester formation can achieve similar stabilization; this reaction, or its equivalent, has been proposed as a necessary step for detecting sialylated glycans with the Shimadzu quadrupole ion trap-TOF (QIT-TOF) instrument where there is considerable loss of sialic acid (1/11) as the result of post-source decay (Mandato et al., 2006). & 0.5 mg) in 2H2O (200 mL) containing 10% 2H3-acetonitrile (the acetonitrile was necessary to ensure the complete solubility of the matrix). The solution was lyophilized and redissolved in 2H2O (100 mL) plus 2H3-acetonitrile (25 mL) immediately prior to spotting 0.5 mL onto an ice-cold, stainless steel target. The target was stored in an airtight polyethylene container at 208C over Dryrite and, after 24 hr, was transferred to the spectrometer inlet. To minimize the condensation of atmospheric water onto the cold target, this transfer was made with the inlet to the mass spectrometer enclosed inside a nitrogen-flushed glovebox. The method was applied to several sugars including malto- and xylopyranoses, a- (4/24) and b-cyclodextrins (4/6), stachyose (1/19), chitotetraose (13), and erythromycin (4/4). VI. CLEAN-UP OF SAMPLES PRIOR TO MALDI ANALYSIS A. Trapping of Glycans and Glycoproteins Lee et al. (2005e) have prepared magnetic beads linked to 4aminophenylboronic acid (14) and used the ability of the boronic acid to form cyclic boroxanes with carbohydrates to isolate glycoproteins from solution. The bound glycoproteins were removed with a magnet and transferred directly to the MALDI target from which spectra were recorded from sinapinic acid. CHCA was used for tryptic peptides derived directly from the bound glycoproteins. Similar beads have been used to enrich glycated insulin (Farah et al., 2005). Sparbier, Wenzel, and Kostrzewa (2006) have used magnetic beads functionalized with ConA, wheat germ agglutinin (WGA) or 3-aminophenyl-boronic acid to extract glycoproteins from human serum. Analysis of the enriched serum proteins by tryptic digestion and MALDI-TOF/ TOF MS/MS analyses revealed the specific binding of nine glycosylated proteins by ConA, eight glycosylated proteins by WGA and eight glycoproteins by boronic acid. Only four nonglycosylated peptides were identified. Each bead type presented its own individual binding profile overlapping with the profiles of the two others. A method has been reported for enrichment of O-GlcNAc-modified peptides by use of lectin affinity chromatography with wheat-germ agglutinin as the lectin (Vosseller et al., 2006). The method was successfully used to enrich 145 unique O-GlcNAc-modified peptides from a post-synaptic density preparation. D. Carbohydrates Labeled with Stable Isotopes Hydrogen–deuterium exchange can be used for studies of carbohydrate structure and carbohydrate–protein interaction but has been plagued by back-exchange of deuterium by hydrogen. Price (2006) has now reported a method for optimization of the deuteration reaction and for minimizing back exchange. Typically, the exchange reactions involved mixing the carbohydrate sample (0.2–0.3 mg) and DHB (0.5 mg; oxalic acid, Mass Spectrometry Reviews DOI 10.1002/mas Nanoparticles whose surfaces have aminooxyl groups have been developed for extracting carbohydrates from biological 5 & HARVEY matrices (Niikura et al., 2005). Reducing carbohydrates reacted with the amino groups of the nanoparticles to form oximes and the complexes were isolated by centrifugation. The glycans were then released under acidic conditions. The method was demonstrated with N-glycans released from ovalbumin. Before nanoparticle treatment, no glycans were observed in the reaction mixture but after treatment, only signals from the glycans were present. A method for trapping released glycans by chemical reaction with a water-soluble polymer carrying reactive amino groups has been developed (Nishimura et al., 2005). After isolating the complex, the sugars could be released and examined by MALDI-TOF. Experiments were conducted with N-glycans released from human immunoglobin (IgG) and profiles similar to those obtained by HPLC were observed. B. Use of Resins Yu et al. (2005c) from Waters Corporation, Milford, MA, have reported the use of hydrophilic interaction chromatography (HILIC) sorbent to clean sugars after PNGase release. The sorbent was packed into a 96-well microelution device which was operated with a vacuum manifold. Each well was washed with Milli Q water and conditioned with 200 mL of 90% MeCN. The deglycosylated sample was diluted with MeCN (20 mL glycan solution to 180 mL MeCN to bring the organic concentration to 90%) and loaded onto the HILIC plate. Salts, detergent, and protein residues were washed out with 200 mL of 90% MeOH/ water after which the glycans were eluted with 20–50 mL 10 mM ammonium citrate in 25% MeCN (pH 8). Recovery was estimated to be 70% using a RapiGest surfactant to denature the glycoproteins prior to enzymatic glycan release (see below) and both MALDI-TOF and MALDI-Q-TOF spectra were reported from DHB for folate-binding protein, ovalbumin and IgG glycans. HILIC clean-up has also been demonstrated by Thaysen-Andersen and Højrup (2006) for glycopeptides from bovine fetuin. Many other resins have been used in the review period; some of these are C18 to remove peptides (Parry et al., 2006b), cellulose cartridges (Higai et al., 2005) and GlycoClean H cartridges (Prozyme, San Leandro, CA), (Wong, Yap, & Wang, 2006) for N-glycans. High salt content has been removed with a Microcon YM-10 centrifugal filtering device with a low-binding, anisotropic, hydrophilic cellulose membrane with a nominal mass limit of 10,000 (Mechref, Muzikar, & Novotny, 2005). VII. QUANTIFICATION amine stock solution and a 10% acetic anhydride solution in dioxane. Treatment of the reaction mixture with 10 mL of a 26% aqueous ammonia solution resulted in the hydrolysis of O-acetyl groups and gave N-acetylglucosamine-6P as a single product. Spectra were recorded in negative ion reflectron mode with THAP as the matrix and good linearity and reproducibility were reported. VIII. FRAGMENTATION By use of an enzymatic reaction, biantennary N-linked glycans have been prepared in which one of the galactose rings contained 13C. Positive ion fragmentation with a MALDI-QIT-TOF instrument showed preferential elimination of Gal-GlcNAc moieties from the 6-antenna. This represents one of the few studies in which stable isotope labeling has been used to study details of the fragmentation mechanisms undergone by N-linked glycans (Kato et al., 2004). A. Post-Source Decay (PSD) Post-source decay (PSD) studies on isomeric trehaloses have shown that Y-type fragments are most abundant from the a,a-isomer (3/39) as predicted from theoretical calculations. Use of hydroxy-deuterated trehaloses showed an isotope effect that was greatest for the b,b-isomer (17) but this could not be explained purely on vibrational effects and was probably related to molecular conformation (Yamagaki, Fukui, & Tachibana, 2006). Takashiba et al. (Takashiba, Chiba, & Jigami, 2006) have studied the fragmentation of phosphorylated high-mannose glycans from yeast mannan and noted that, whereas the HPO3Man bond is stable, the mannose-a-1-PO3 (18) bond is not. The position of the phosphate residue in the 3-antenna could be determined by the masses of Y-type fragments (positive ion mode). PSD spectra of g-cyclodextrin (1/65) and the isomeric maltosyl-a-cyclodextrin (19) contained fragment ions at the same masses (loss of glucose fragments) but at different relative abundances, allowing the isomers to be differentiated (Yamagaki, 2005). A method for quantification of glucosamine-6-phosphate (15) as an assay for glucosamine-6-phosphate synthase has been developed (Maillard et al., 2006). N-(13C2)-acetylglucosamine6-phosphate (16) was used as the internal standard because it could be prepared with use of the commercially available 13 C2-acetic anhydride. However, this method necessitated N-acetylation of the analyte in the enzyme-buffered mixture under conditions that were compatible with MALDI analysis. The adopted conditions involved the use of a 0.7 M trimethyl6 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES B. Collision-Induced Dissociation (CID) High-energy CID spectra obtained with a TOF/TOF instrument have again been shown to produced enhanced abundance of cross-ring cleavage, particularly X-type, ions (Lewandrowski, Resemann, & Sickmann, 2005; Yu, Wu, & Khoo, 2006). Some protonated fragment ions were observed in the CID spectra of sodiated precursors when DHB was used as the matrix but the reason for their formation was unclear. Kurogochi and Nishimura (2004) had previously reported the formation of such ions and observed that they could be suppressed with CHCA. However, it was also noted that this matrix suppressed formation of the cross-ring products. Mechref, Kang, and Novotny (2006) have used permethylation and the high-energy fragmentation available with the 4700 TOF/TOF instrument to produce cross-ring fragments from sialylated glycans and have reported that 0,4A2, 3,5A2, and 2,4 A3/2,4X1 ions at m/z 458.2, 486.3, and 588.4 are present only in the spectra of glycans containing an a-(2 ! 6)-linked sialic acid. In branched structures, ions were found that enabled branchspecific linkage to be determined. A TOF instrument with a curved field reflectron has been modified by the inclusion of a collision cell to enable high-energy spectra to be obtained (Belgacem et al., 2006). The resulting spectrum of Man8GlcNAc2 (20) contained abundant X-type cleavage fragments that were not seen in the low energy spectrum. Most fragmentation of neutral glycans is acquired in positive ion mode because of the reluctance of the compounds to form negative ions. However, Wuhrer and Deelder (2005) have reported that N-glycans labeled with 2-AB give strong [M H] ions in negative ion mode from an ATT matrix. Fragmentation of these ions in a TOF/TOF mass spectrometer by laser-induced Mass Spectrometry Reviews DOI 10.1002/mas & dissociation (LID) gave spectra dominated by C and cross-ring fragments reminiscent of those from PSD spectra of [M þ Cl] ions reported by Yamagaki, Suzuki, and Tachibana (2005) and low-energy electrospray-CID spectra of various adducts reported by Harvey (2005a,b,c). Fragments from these negative ions provide much more informative spectra than those in positive ion spectra. Comparisons of the MS2 fragmentation of [M þ H]þ and [M þ Na]þ ions from 2-AP-labeled complex N-linked glycans in a MALDI-QIT instrument have shown that, whereas the [M þ H]þ ions yielded mainly Y-type cleavage ions, the [M þ Na]þ ions gave a wealth of B-, Y- and cross-ring product ions that provided much more structural information. Isomeric monogalactosylated biantennary glycans (21, 22) could be differentiated by relative intensity differences in some of the fragment ions in the MS2 spectra of the [M þ Na]þ ions (Ojima et al., 2005). MSn spectra recorded with this instrument have also allowed isomeric milk sugars to be differentiated (Suzuki et al., 2005b). Fukui et al. (2006) have performed quantum-mechanical calculations on sodiated ions of small oligosaccharides and have attempted to compare their results with the observed spectra with an AXIMA QIT instrument to determine the Naþ affinity for several binding positions and the dependence of fragmentation on the location of sodium. The Na position was less crucial in terms of the resulting fragment ions for the loss of Fucp and Neup5Ac because of the acidic functionality and electronegativity of the Neup5Ac and Fucp residues. The calculated structures for the oligosaccharides containing Manp as a reducing end and GlcpNAc indicated an increase in stability with an increasing number of oxygen atoms interacting with the Naþ ion. The preferred calculated position of Na was in the vicinity of GlcNAc residues, which was consistent with the experimental results. 7 & HARVEY 1. Multiple Successive Fragmentation (MSn) Takemori, Komori, and Matsumoto (2006) have developed a method for glycoprotein analysis that involves in-gel tryptic digestion and analysis of the resulting tryptic glycopeptides with a MALDI-QIT-TOF MS. Fragmentation at the MS2 and MS3 stages involved mainly the glycan portion of the molecules and the technique was used to characterize N-linked glycopeptides from Drosophila cuticle protein. The advantages of using negative ion MS/MS for sugar analysis have been stressed and applied to the ion-trap MSn fragmentation of mono-to hexa-saccharides that mimic the terminal epitopes of the O-antigens from Vibrio cholerae O:1, serotypes Ogawa and Inaba. The two strains are differentiated by the presence of a methoxy group at C2, the chain linkage position, in the Ogawa strain. The fragmentation patterns allowed the two serotypes to be differentiated (Bekesová et al., 2006). The compounds could also be differentiated in positive ion mode with a TOF/TOF instrument (Kovácik et al., 2006). Reinhold’s group have made considerable use of this technique. Several examples are included in the tables below and, in addition, they have developed software for analysis of the resulting spectra as described in the section on Computer Analysis of Spectra. C. Other Methods Laser-induced (157 nM) photofragmentation has been compared with CID with a TOF/TOF instrument. Cation-derivatized carbohydrates (e.g., derivatized with Girard’s T reagent, 1/55) produced spectra containing abundant cross-ring cleavage ions with better coverage than provided by low or high energy CID. On the other hand, native (underivatized) carbohydrates gave better results by CID (Devakumar, Thompson, & Reilly, 2005). Normal-phase HPLC coupled off-line to MALDI-TOF/TOF MS/MS has been reported to be a good method for isomer differentiation (Maslen et al., 2006). The TOF/TOF instrument produced abundant cross-ring fragment ions revealing linkage information. Two ions were found from 2-AA-derivatized paucimannosidic glycans that were diagnostic for the presence of an a-(1 ! 3)-linked fucose residue. Formation of one of these was proposed to involve direct interaction of the acid group of the derivative with the fucose as proposed in Scheme 1. D. Internal Residue Losses Additional problems have been reported for fragmentation of protonated glycans as the result of internal rearrangements (Wuhrer et al., 2006c). Biantennary glycans (4/23) with either the Gal-b-(1 ! 4)-[Fuc-a-(1 ! 3-]-GlcNAc-b-1 ! or GalNAcb-(1 ! 4)-[Fuc-a-(1 ! 3-]-GlcNAc-b-1 ! antennae, free or 2AB labeled, showed migration of fucose between antennae so that difucosylated antennae could be deduced erroneously. The transfer did not occur from the core fucose, and was not observed for sodiated adducts or for permethylated glycans. E. Fragmentation of Negative Ions In-source decay (ISD) of [M H] ions from small neutral carbohydrates can be produced from the matrix nor-harmane and these ions fragment to give abundant cross-ring cleavage products yielding linkage information. PSD fragmentation of [M þ Cl] ions is similar with all fragments being deprotonated following loss of HCl (Yamagaki, Suzuki, & Tachibana, 2005). PSD fragmentation of the [M þ Cl] ion from lactooligosaccharides (e.g., 23, 24) produces prominent A-type cross-ring cleavage ions from the reducing-terminal glucose residues whereas CID fragmentation in an ion trap is dominated by Ctype glycosidic cleavages similar to those seen with Q-TOF instruments. The differences have been attributed to collisional cooling of the [M þ Cl] ions in the trap and the possibility that these ions decompose in the flight tube in the PSD experiment to give deprotonated molecules that then rapidly decompose (Yamagaki, Suzuki, & Tachibana, 2006a,c). The very specific fragmentation processes occurring in the negative ion spectra of neutral sugars results in ions that are specific to certain isomers. Yamagaki, Suzuki, and Tachibana (2006b) have shown that measurements of the ratio of such ions in mixtures of isomers can be used to estimate the percentage of each because there is a linear relationship between ion abundance and percent of a compound in a mixture. Furthermore, it was noted that C ions are often very abundant adjacent to HexNAc residues and a mechanism involving transfer of the amide proton to the negative site at the cleaved oxygen was proposed. F. Infrared Multiphoton Dissociation (IRMPD) A comparison of the CID and IRMPD spectra of 39 mucin-type O-glycans has shown that they yield nearly identical spectra corresponding to the lowest energy fragmentation pathways (Zhang, Fu, & Ning, 2005b). However, fragmentation efficiency of IRMPD was reported to be better that that for CID for the larger glycans (above m/z 1400). Both IRMPD and CID produced similar fragmentation patterns from N-glycans although IRMPD has been reported to yield more cross-ring cleavage products with the mannose branch points being particularly susceptible to cleavage (Lancaster et al., 2006). SCHEME 1 8 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & G. LIFT-TOF H. Computer Analysis of Spectra Kamekawa et al. (2006) have investigated a combination of frontal affinity chromatography (FAC) and MALDI LIFT-TOF/ TOF MS of four groups of the 2-AP derivatives of structural isomers and have shown that most can be differentiated by mass spectrometry. However, two pairs, lacto-N-tetraose/lacto-N-neotetraose (LNT/LNnT, 23/24) and lacto-N-hexaose/lacto-N-neohexaose (LNH/LNnH, 25/26) that differed in having either a b-(1 ! 3)- or b-(1 ! 4)-linked galactose residue at the reducing terminus (type 1 and type 2 chains, respectively) could not. FAC, however, did differentiate these isomers; a galectin from the marine sponge Geodia cydonium (GC1) and a plant seed lectin from Ricinus communis (RCA-I) were used for identification of these chains, respectively emphasizing the importance of the combination of FAC with mass spectrometry. Following the demise of CarbBank, there have been several initiatives to construct glycan databases and tools for glycomics. One such source is the Kyoto Encyclopedia of Genes and Genomes (KEGG, http://www.genome.jp/kegg/glycan). This resource contains a database of carbohydrate structures (GLYCAN), glycan-related biochemical pathways and a map illustrating all possible variations of carbohydrate structures within organisms (composite structure map, CSM). GLYCAN also includes a structure drawing tool (KegDraw) and a glycan search and alignment tool (KEGG Carbohydrate matcher, KCaM) (Hashimoto et al., 2006). A similar web source is GLYCOSCIENCES.de portal (http://www.glycosciences.de). Its database contains references, structures, compositions, NMR shifts, mass spectral fragments (theoretically calculated), and protein database references (Lütteke et al., 2006). Similar information can be found from the Consortium for Functional Glycomics (http://www.functionalglycomics.org) (Raman et al., 2006). Reviews of available databases relating to glycomics have been published (Raman et al., 2005; von der Lieth, Lütteke, & Frank, 2006) and web-based tools available for glycan analysis are discussed in a review by Pérez and Mulloy (2005). A program called ‘‘Cartoonist’’ has been developed to annotate MALDI spectra with structures chosen from a library. The software takes account of the biosynthetic pathways involved and gives each plausible structure a confidence score (Goldberg et al., 2005). ‘‘CartoonistTwo’’ proposes structures for O-linked glycans by automatically analyzing fragmentation spectra and is reported to be an improvement on previous versions of the software because of its scoring function which is more able to differentiate similar structures. In an evaluation with O-glycans from Xenopus egg jelly, the software’s predictions agreed with manual determination in 50% of the spectra. The first or second highest scoring structure agreed with manual determination 90% of the time (Goldberg et al., 2006). The StrOligo algorithm (Ethier et al., 2002, 2003) for assigning structures to N-linked glycans, developed by the Manitoba group and described in the earlier review (Harvey, 2008a), has been compared with more conventional techniques in an investigation of N-glycans, as 2AB derivatives, from human integrin a5b1 (Ethier et al., 2005). The algorithm identified many of the constituent glycans but polysialylated glycans were problematic and isomeric compounds could not be resolved. The authors recommended using it in combination with more traditional techniques such as exoglycosidase digestion and multistage MS/MS. The program GlycoX is designed to predict the compositions of glycans and glycosylation sites of glycans attached to small peptides of the type obtained by pronase digestion (An et al., 2006b). The program takes, as input, the exact mass of the peptide and the glycan spectra in the form of a mass/intensity table and computes both the site and the glycans attached to that site. It has predicted correct glycan compositions for several model glycoproteins. N-glycosylation sites can be predicted with the NetNGlyc server at http://www.cbs.dtu.dk/services/ NetNGlyc/. In a series of three articles from Reinhold’s laboratory, a MSn method is described for structural analysis of permethylated X-Type fragments have also been reported from 2-ABderivatized tetra-, penta-, and hexa-saccharides recorded on a TOF/TOF instrument with LIFT technology (Morelle et al., 2005b). Weak X-type fragments were also present in fragmentation spectra of permethylated glycans studied by Wuhrer and Deelder (2006) in experiments that involved the CID fragmentation of ISD fragments produced in the ion-source of a LIFT MS/ MS instrument. Permethylation allowed distinction between terminal, monosubstituted and disubstituted monosaccharides and indicated the oligosaccharide sequence. Substitution positions were deduced based on characteristic cross-ring fragmentation induced by the high-energy collision-induced fragmentation. As an example of the results, fragmentation of the B-ion ion resulting from loss of the reducing terminal GlcNAc residue enabled two isomeric Man3GlcNAc2 N-linked isomers (27, 28) to be differentiated. LIFT-TOF spectra of [M H] ions generated from N-acetylheparosan (29) oligosaccharides have been shown to produce mainly C, Z, and B, Y glycosidic cleavages with some low abundance cross-ring fragments (Minamisawa, Suzuki, & Hirabayashi, 2006). Mass Spectrometry Reviews DOI 10.1002/mas 9 & HARVEY glycans whose fragmentation spectra are recorded with a QIT spectrometer (Ashline et al., 2005; Lapadula et al., 2005; Zhang, Singh, & Reinhold, 2005). An algorithm named Oligosaccharide Subtree Constraint Algorithm (OSCAR) uses a database of the masses of 12,378 glycans containing hexose(0–12), HexNAc(0–12), dHex(0–5), and Neu5Ac(0–5) and 4,542,720 possible fragments. Masses of ions from various fragmentation pathways are used as the input and the algorithm computes and presents the one or more structures that satisfy the fragmentation data. A strategy for combined MS3 and library search procedures has been developed by Kameyama et al. (2005) for structural analysis of N-glycans. The library consists of MS2 and MS3 spectra of all fragment ions from the MS2 spectra. In use, the computer selects which fragment ion from the MS2 spectrum would yield the most informative MS3 spectrum and the method was used to assign structures to N-glycans from human IgG. Kameyama et al. (2006) have constructed a library of simulated fragmentation spectra in an attempt to overcome the need for a large number of reference compounds. Di-, tri-, and tetra-antennary N-glycans were labeled in each antenna with 13 C6-D-galactose to identify characteristic fragment patterns for each branch type of N-linked oligosaccharides. On the basis of the resulting characteristic fragment patterns, the authors could simulate CID spectra for isomeric oligosaccharides and were able to use the library to identify an N-linked glycan with dissimilar antennae. The biosynthetic pathways of N-linked glycans involve a relatively small number of enzymes and monosaccharides. Many of the enzymes can use multiple N-glycans as substrates, thus generating a large number of glycan intermediates and making the biosynthetic pathway resemble a network with diverging and converging paths. Thus, the N-glycans on any one particular glycoprotein include not only terminal glycans, but also intermediates from the biosynthetic pathway. The program GlycoVis has been designed to assess the glycan distribution and potential biosynthetic route to each N-glycan taking into account the substrate specificities of the enzymes involved. The input to the program is the glycan distribution data and the program outputs a reaction pathway map which labels the relative abundance levels of different glycans with different colors. The program also traces all possible reaction paths leading to each glycan and identifies each pathway on the map. Use of the program is illustrated with MALDI-TOF data from permethylated glycans from IgG and tissue plasminogen activator (TPA) (Hossler et al., 2006). A Glycan Finder program written in Igor Pro version 5.04B software available from WaveMetrics, Inc., Portland, OR, for assigning compositions to milk oligosaccharides has been developed (Ninonuevo et al., 2006). The algorithm examines a list of experimentally measured masses and searches for all possible monosaccharide combinations matching the experimental mass within a specified tolerance level (mass error). In addition to providing information regarding the possible monosaccharide composition, the program sorts each measured mass on the basis of its HPLC retention time and relative intensity. An algorithm GLYCH has been developed to interpret the high-energy MS/MS spectra of carbohydrates based on their fragmentation spectra (Tang, Mechref, & Novotny, 2005). In 10 particular, cross-ring and internal cleavages are accommodated to a greater extent than in other algorithms. The program first applies a scoring scheme to identify potential bond linkages between monosaccharides, based on the appearance pattern of cross-ring ions. Next, it uses a dynamic programming algorithm to determine the most probable oligosaccharide structures from the mass spectrum and, finally, it re-evaluates these oligosaccharide structures, taking into account the double (internal) fragmentation ions. The algorithm appears to work best for linear structures but is still under development. A copy of the software is available from the authors. Lewandrowski, Resemann, and Sickmann (2005) have shown that the high-energy CID spectra obtained with a TOF/ TOF instrument gave better scoring than spectra produced by LID when using existing glycan databases such as GlycoSuitDB and Glycosciences DB. IX. STUDIES ON SPECIFIC CARBOHYDRATE TYPES A. Polysaccharides Most of the applications articles relating to this large group of compounds are summarized in Tables 1–3. Only a few reports containing information on specific methods are described below. Analysis of most compounds by MALDI–MS is only possible after depolymerization; methods are given in column 3 of the tables. Of several matrices (b-carboline, nor-harmane-DHB, THAP and sinapinic acid) tested for UV-MALDI-TOF analysis of b-(1 ! 3)- and b-(1 ! 4)-xylans from the red seaweed Nothogenia fastigiata, only nor-harmane gave satisfactory signals (positive ion mode) but with distribution profiles lower than those determined earlier by NMR suggesting a decrease in ionization efficiency with increasing molecular weight. Because the glycans retain a small amount of calcium, the influence of Ca2þ was investigated. Added sodium chloride was shown not to change the distribution profile whereas calcium chloride suppressed the signals (Fukuyama et al., 2005). Choi and Ha (2006) report that the relative abundance of the [M þ Na]þ ion from the malto-oligosaccharides containing from three to seven residues increases to a maximum for the hexamer and attribute their findings to the increased chance for sodium bridges to form between adjacent sugar rings for the larger oligomers. Continuous spray deposition of aqueous solutions of partially depolymerized methyl cellulose (30) from an HPLC column has been reported to improve sensitivity of detection by up to an order of magnitude compared with standard preparation techniques (Momcilovic et al., 2005b). Furthermore, the analyte was more evenly distributed over the target surface, resulting in higher reproducibility. However, it provided a less accurate estimation of average molar masses than the droplet deposition technique. A MALDI-TOF–MS method has been developed for Mass Spectrometry Reviews DOI 10.1002/mas TABLE 1. Use of MALDI–MS for examination of carbohydrate oligomers and polymers from plants (Continued ) ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas & 11 HARVEY TABLE 1. (Continued ) & 12 Mass Spectrometry Reviews DOI 10.1002/mas & 1 Instrument type (matrix), compounds analyzed (derivatives), other techniques. ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 13 TABLE 2. Use of MALDI–MS for examination of carbohydrate polymers from bacteria & 14 HARVEY Mass Spectrometry Reviews DOI 10.1002/mas & 1 Instrument type (matrix), compounds analysed (derivatives), other techniques. ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 15 & HARVEY TABLE 3. Use of MALDI–MS for examination of carbohydrate polymers from fungi, algae, etc. 1 Instrument type (matrix), other techniques. the evaluation of the degree of substitution (DS) in partially depolymerized carboxymethyl cellulose. A matrix of ammonium sulfate and DHB gave good quality spectra without the usual ‘‘sweet-spots’’ at the crystalline rim of the MALDI target. It was shown that the degrees of substitution calculated from spectra acquired from the center region of the MALDI target spot were in better agreement with those provided by the supplier than were the values obtained from the large crystals at the target spot rim. This observation could be one explanation for the higher DS values reported in other publications (Enebro & Karlsson, 2006). A new method for structural investigations of rhamnogalacturonans involves methyl esterification of the GalA groups with tetrabutylammonium fluoride and iodomethane in DMSO allowing cleavage at the esterified moieties by b-elimination at elevated temperature. Oligosaccharide fragments containing a single side chain were generated, providing a means to thoroughly characterize the structural features of these complex compounds. The degree of methyl esterification was estimated by the use of 13C-methyl groups introduced from 13C-MeI. Products were monitored by MALDI-TOF–MS and NMR (Deng, O’Neill, & York, 2006). Several techniques for the analysis of xyloglucan oligosaccharides from black currents have been compared. All three separation techniques (HPAEC, RP–HPLC, and CE) showed different elution orders for the oligomers obtained after enzyme degradation. HPAEC and CE showed similar separation profiles, while RP–HPLC was not able to separate all oligomers. MALDI16 TOF–MS and ESI–MSn were also compared. They could be used either instead of, additionally to, or coupled either off line to HPAEC or online to RP–HPLC or CE–MS. CE with laserinduced fluorescence proved to be the fastest way to quantify xyloglucan oligomers but MALDI-TOF–MS could be used for fast oligosaccharide profiling, because many samples could be analyzed in a short time. For structural characterization ESI–MSn outclassed PSD (Hilz et al., 2006). Oligosaccharides produced by depolymerization of hydroxypropylmethyl cellulose, hydroxypropyl cellulose or methylcellulose with endoglucanase from Bacillus agaradhaerens have been reacted with dimethyl-, diethyl-, and dipropyl-amine by reductive amination. All three derivatives produced a considerable increase in sensitivity, especially for small (DP < 3) oligosaccharides, thus partially overcoming low mass discrimination often seen with MALDI-TOF instruments (Momcilovic et al., 2005a). Dimethylamine was the preferred reagent. Chan, Chan, and Tang (2006) have compared MALDI-TOF, direct refractometric analysis, UV–vis absorption analysis of the Aniline Blue-stained sample and GC/MS analysis of the hydrolyzed and trimethylsilyl (TMS)-derivatized sample for estimating the molecular weight of the extracellular polysaccharide Curdlan (4/25). All samples were fractionated by gel permeation chromatography. Even so, the results showed that results from the MALDI measurements underestimated the molecular weight and polydispersity of water-insoluble Curdlan (with and without GPC fractionation) and were unreliable. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES 1. Cyclodextrins (CD) and Related Compounds Matrix-assisted laser desorption/ionization (MALDI)-TOF and HPLC have been used to characterize a new class of methylated b-cyclodextrins (Jacquet et al., 2005). A thin layer of CHCA was used as the matrix and CDs with from two to eight methyl groups were found. The thin layer method of sample preparation was reported to give much more reproducible spectra than targets prepared by the dried droplet method which produced increased signals for the more highly methylated CDs. The effect was attributed to the properties of the analyte-matrix crystals. The ability of cyclodextrins to form inclusion complexes has been used by Zhang et al. (2006) to obtain molecular weights of explosives. The inclusion complexes were produced by stirring a mixture of the two components at 508C for 72 hr followed by 48 hr at 08C. MALDI-TOF spectra were recorded from sinapinic acid. Amphiphilic b-cyclodextrins with alkylthio chains at the primary-hydroxyl side and galactosylthio-oligo-(ethylene glycol) units at the secondary-hydroxyl side have been synthesized and shown to form nanoparticles and vesicles (Mazzaglia et al., 2004). These compounds were shown by MALDI-TOF to bind to the galactose-binding lectin from Pseudomonas aeruginosa (PA-1) which was chosen for its low molecular weight which is only three times that of the cyclodextrin. The spectrum of an equimolar mixture of lectin and the cyclodextrin derivative gave peaks for the individual constituents and the 1:1 CD:PA-1 (m/z 16,588, sodium adduct) and 2:1 complexes showing that the binding of CD to the lectin is relatively strong, and involves effects other than inclusion by the CD of lectin lipophilic side chains. A MALDI mass spectrum under the same conditions for the glucosylated CD showed a barely detectable peak corresponding to lectin–CD complex, and no evidence for a 1:2 complex. 2. Milk Oligosaccharides For a recent review of milk oligosaccharides, see Mehra and Kelly (2006). Several methods for structural determination of human milk oligosaccharides have been compared by Ninonuevo et al. (2006). MALDI–FTICR and IRMPD were used to analyze HPLC fractions and another system employed a microfluidic HPLC-Chip/MS device from Agilent, Foster City, CA. One hundred eighty-three sugars were identified; many had large amounts of fucose. The authors concluded that HPLC-Chip/MS profiling of oligosaccharides provides a rapid and accurate method for determining the number of milk oligosaccharide components and those that contain fucosylated and sialylated residues in the low femtomole range. The microfluidic HPLCChip/MS device was found to be both robust and to give reproducible results. A method has been developed for examination of milk oligosaccharides separated on high-performance (HP) TLC plates and applied to human and elephant milk with a limit of detection of approximately 10 pmol (Dreisewerd et al., 2006). Glycerol was used as a liquid matrix, to provide a homogeneous wetting of the silica gel and an infrared laser was used for volume material ablation and particular soft desorption/ionization conditions. ‘‘Mobility profiles’’ were acquired by scanning the laser Mass Spectrometry Reviews DOI 10.1002/mas & beam across the analyte bands. A liquid composite matrix of glycerol and the ultraviolet (UV) MALDI matrix, CHCA, allowed direct HPTLC–MALDI–MS analysis with a 337 nm-UV laser but with a 10-fold reduction in sensitivity. Using a library of lectins, Nakajima et al. (2006) have identified several oligosaccharides from bovine colostrum. Two compounds that evaded identification by the lectins were characterized as GalNAc-b-(1 ! ?)-Gal-b-(1 ! 4)-Glc, where ? represents an undetermined linkage, and GalNAc-a-(1 ! 3)(Fuc-a-(1 ! 2)-Gal-b-(1 ! 4)-Glc by MALDI–QIT-TOF–MS. Bifidobacterium infantis has been shown to ferment purified human milk oligosaccharides as a sole carbon source, while another gut commensal, Lactobacillus gasseri, did not ferment the carbohydrates (Ward et al., 2006). MALDI spectra were recorded with an FT-ICR instrument. A unique sialylated tetrasaccharide (GalNAc-b-(1 ! 4)-[Neu5Ac-a-(2 ! 3)]-Galb-(1 ! 4)-Glc and several other carbohydrates have been identified in the colostrum of the bottlenose dolphin (Tursiops truncatus) by HPLC, NMR, and MALDI–QIT–MS (DHB) (Uemura et al., 2005). Although these glycans have not been reported from natural sources in the free state, they are common constituents of gangliosides. 3. Other Polysaccharides Enzymatically digested kappa-, iota-, and hybrid iota/nu carrageenans, sulfated polymers of 4-linked a- and b-linked D-galactose, from red algae have been examined by MALDITOF–MS in negative mode with nor-harmane as the matrix but loss of sulfate meant that kappa- and iota carrageenans could not easily be distinguished from each other as they differ only in substitution position (Antonopoulos et al., 2005). The iota/nu carrageenans, however, could be distinguished because their repeating units were different. For all compounds, fragmentation involved loss of anhydrogalactose from the non-reducing end of the molecules. Autohydrolysis products of partially cyclized mu/nu-carrageenan from Gigartina skottsbergii, recorded by MALDI-TOF from nor-harmane, have shown a uinmodal distribution of even and odd peaks suggesting fragmentation of glycosidic linkages. B. Glycoproteins The growing use of chromatographic and electrophoretic methods in combination with MALDI-TOF and TOF/TOF and on-line permethylation techniques for glycan analysis have been reviewed (Novotny & Mechref, 2005). A large number of studies have been published in this area; most are summarized in Tables 4 (specific glycoproteins) and 5 (whole organisms or tissues). 1. Intact Glycoproteins Glycoproteins have been extracted from biological matrices by use of magnetic beads coated with either Concanavalin A or di-boronic acid. The beads were employed specifically to bind model proteins containing N-glycans of different oligosaccharide types. Thus, Con A beads successfully isolated RNase B from human serum but were less efficient at isolating glycoproteins with complex glycans. No binding of glycoproteins to the 17 TABLE 4. Use of MALDI–MS for examination of N-glycans from specific glycoproteins & 18 HARVEY Mass Spectrometry Reviews DOI 10.1002/mas & (Continued ) ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 19 HARVEY TABLE 4. (Continued ) & 20 Mass Spectrometry Reviews DOI 10.1002/mas & (Continued ) ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 21 HARVEY TABLE 4. (Continued ) & 22 Mass Spectrometry Reviews DOI 10.1002/mas Mass Spectrometry Reviews DOI 10.1002/mas Glycan release and (peptide cleavage). Instrument (matrix), other technique, sample (derivative). 2 1 ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & 23 TABLE 5. Use of MALDI–MS for examination of N-glycans from intact organisms, tissues or protein mixtures & 24 HARVEY Mass Spectrometry Reviews DOI 10.1002/mas Mass Spectrometry Reviews DOI 10.1002/mas Format: Release and (peptide cleavage). Instrument (matrix), other technique, sample (derivative). 2 1 ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & 25 & HARVEY beads was observed under competing conditions in the presence of an excess of free mannose. Similarly, the use of di-boronic acid-functionalized beads was validated by the capturing of different model glycoproteins (Sparbier et al., 2005). A concanavalin A-immobilized affinity column has been developed for glycoprotein/glycopeptide extraction and demonstrated with ribonuclease B containing high-mannose glycans. Optimum separation was obtained with a-methyl-D-mannopyranoside in the mobile phase. Müller and Allmaier (2006) have evaluated the ability of MALDI-TOF–MS to measure the mass of intact polyclonal human IgM which consists of a cluster of individual glycosylated molecules. The sample was extensively desalted with a C18 ZipTip and the best MALDI matrix was found to be THAP. Ions in charge states of 3–9 were found (Fig. 2), the possible lower charge stated being above the mass range of the instrument. An average mass of 1025.3 28.2 kDa was determined for the intact molecular cluster, which turned out to be in good agreement with published data. 2. N-Linked Glycans Mechref, Muzikar, and Novotny (2005) have stressed the importance of a multimethodological approach to the structural identification of these compounds, for example, MALDI, ESI, and FAB mass spectrometry do not provide information on the constituent monosaccharides; such information needs to be obtained with parallel data from exoglycosidase digestion or GC/MS. a. Site occupancy. One hundred seventeen hydrophobic Nglycosylated glycoproteins have been identified from extracts of FIGURE 2. Positive ion MALDI-TOF spectrum of intact polyclonal human IgM recorded from THAP. From Müller and Allmaier (2006) with permission from John Wiley and Sons Ltd. 26 Caenorhabditis elegans using a proteomics approach. These yielded 195 glycopeptides containing 199 Asn-linked glycans. Attachment sites were identified by MALDI-TOF by utilizing the Asn–Asp conversion after deglycosylation with PNGase F. The glycans themselves were not identified (Fan et al., 2005b). Similar studies using the Asn–Asp conversion has determined that four of the six potential sites of lysosomal hydrolase mannose 6-phosphate uncovering enzyme are glycosylated (Wei et al., 2005b), that folate binding protein is glycosylated at Asn-49 and -141 (Chen, Lee, & Stapels, 2006), that all three sites (Asn-211, -262, and -303) are glycosylated in decorin from human lung (Didraga et al., 2006b), that human recombinant sRAGE is glycosylated at the two predicted N-glycosylation sites, Asn-25 (completely glycosylated) and Asn-81 (partially glycosylated) (Ostendorp et al., 2006), that five of the six potential sites of the sGP glycoprotein of Ebola virus (Asn-40, -204, -228, -57, and -268) are glycosylated with the remaining one (Asn-238) being glycosylated only infrequently (Falzarano et al., 2006) and that Asn-79, -99, and -127 from the allergens Ves v 2 from Vespula vulgaris wasp venom are glycosylated (Skov et al., 2006). The Asn to Asp conversion, coupled with the use of 18 O labeling and MALDI-TOF–MS was used by Tie et al. (2006) to show that vitamin K-dependent carboxylase is N-glycosylated at Asn-459, -605, and -627. Okuyama et al. (2005) have determined glycosylation sites of a-glucosidase from Schizosaccharomyses pombe by cleaving the glycans with Endo F to leave a GlcNAc residue at the glycosylation site and observing a 203 mass unit increment from the mass of the tryptic or V8 peptide that contained the putative N-glycosylation site. Glycosylation was detected at seven of the potential 27 sites. Some information on site occupancy and the types of glycan attached has similarly been obtained by use of the endoglycosidase, Endo-H which also cleaves the chitobiose core leaving the reducing terminal GlcNAc residue attached to the protein or the peptide following tryptic digestion. Using this approach, Liou et al. (2006) have shown that, of the three potential glycosylation sites of NPC2, the protein deficient in Niemann-Pick C2 disease, Asn-19 is not glycosylated, Asn-39 is linked to Endo-H-sensitive glycans whereas Asn-116 is variably glycosylated. Similarly, Utz et al. (2006) have used Endo-H to determine that procyclin from the protozoan parasite Trypanosoma congolense has 13 N-linked sites; ESI MS was used to show that these were occupied by high-mannose glycans. Glycosylation sites have been identified by diagonal chromatography which involves two successive identical chromatographic steps with a chemical or enzymatic (in this case PNGase F), step between. The different elution pattern of the second step allows modified peptides to be identified (Ghesquière et al., 2006). The method was demonstrated with a1-acid glycoprotein and used to identify 117 sites in glycoproteins from depleted mouse serum. b. N-linked glycan composition from glycopeptide analysis. A new acid labile surfactant (RapiGest SF, sodium 3-[(2-methyl-2undecyl-1,3-dioxolan-4-yl)methoxyl]-1-propanesulfonate), produced by Waters Corporation has been introduced for denaturing proteins prior to trypsin digestion (Yu et al., 2005b,c). It can Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES easily be degraded with acid after digestion and the products do not interfere with subsequent MALDI analysis. Imre et al. (2005) have shown by MALDI-TOF analysis that complete digestion of human a1-acid glycoprotein (AGP) occurred with RapiGest in the incubation mixture enabling very different glycan profiles to be seen at each of the five glycosylation sites by LC-MS/MS. Thermal-assisted partial acid hydrolysis and TFA used to produce glycopeptide ladders from horseradish peroxide tryptic peptides is described in two very similar articles (Lee et al., 2005a,c). Hydrolysis occurred mainly on the carbohydrate portion; thus the ladders gave information on composition by MALDI-TOF analysis. The ladders shifted to lower m/z values with increasing reaction times. The method was later extended to the glycoproteins ribonuclease B, avidin, human a1-acid glycoprotein, and bovine fetuin (Lee et al., 2005b). Ladders were obtained from ribonuclease B and avidin with one glycosylation site but very little resolution of the hydrolysis products could be observed from the larger glycoproteins with several N-linked sites. A new method based on a two-stage proteolytic digestion has been described for characterization of glycosylated proteins separated by gel electrophoresis (Larsen, Højrup, & Roepstorff, 2005). The first stage involved in-gel proteolysis using a sequence-specific endoproteinase such as trypsin and a small aliquot of the derived peptide mixture was analyzed by mass spectrometry for protein identification based on peptide mass mapping. The remaining peptides/glycopeptides were then incubated with a non-specific proteinase, such as proteinase K which cleaves the majority of the tryptic peptides into smaller peptides. The presence of a glycan created steric hindrance that resulted in a small peptide tag attached to the glycan. Masses were typically around 1,200 Da. Remaining peptides were removed with a Poros R2 microcolumn packed into a GELoader tip (glycopeptides pass through) and the glycopeptides were trapped on a second GELoader tip microcolumn packed with graphite powder. These glycopeptides could efficiently be washed to remove low molecular weight contaminants and subsequently eluted using 30% acetonitrile, 0.2% formic acid. The method, combined with MALDI-TOF monitoring of the glycopeptides was used to examine N-glycans from ovalbumin, ovomucoid, and ovoglycoprotein. Glycopeptides are often difficult to detect in the presence of peptides; thus, when no tryptic peptides with predicted Nglycosylation sites were detected from the human CB1 cannabinoid receptor expressed in Pichia pastoris. Kim et al. (2005b) suggested that the glycosylation sites were occupied. Nevertheless, MALDI-TOF spectra of two glycosylated peptides have been recorded from tryptic digests of arylphorin from the Chinese oak silkworm (Jung, Kim, & Kim, 2005). A method for separating sialylated tryptic glycopeptides from peptides using capillary electrophoresis has been described (Snovida et al., 2006a). The glycopeptides were first fractionated with a short C18 column and then by CE with the effluent deposited directly onto the steel MALDI target which acted as the electrode. The technique was applied to glycopeptides from a1-acid glycoprotein and allowed the four glycosylation sites to be characterized. Amon, Plematl, and Rizzi (2006) have developed a similar system for deposition of the effluent from a CE column directly Mass Spectrometry Reviews DOI 10.1002/mas & onto the MALDI target but, in this case, the electrode was a metal tube surrounding the fused silica capillary with the current being maintained through a liquid junction. c. Glycan release. Still the most popular method of analysis of N-glycans is to release them from the glycoprotein, either chemically, usually with hydrazine, or enzymatically and to use either mass spectrometry (MALDI, ESI, FAB) or HPLC after fluorescent labeling. i. Chemical release. Hydrazine release requires re-acetylation of the amino-sugars with acetic anhydride in the presence of an excess of sodium hydrogen carbonate which later has to be removed. Tanabe and Ikenaka (2006) have developed an incolumn method for hydrazine removal and re-N-acetylation simultaneously using a single graphitic carbon column which they claim overcomes many of the problems with the standard method. After loading the hydrazine reaction solution, the column was washed with 15 mL of 50 mM ammonium acetate buffer and the glycans were eluted with 5 mL triethylamine acetate buffer/acetonitrile (pH 7) containing 2% acetic anhydride. Yields were comparable to those of the standard method whereas they were lower if an ammonium acetate buffer was used for the re-N-acetylation step. ii. Enzymatic release. Protein N-glycosidase F (PNGase F) remains the most commonly used enzyme for glycan release, with PNGase A being used if glycans are fucosylated at the 3position of the core GlcNAc residue. However, some glycoproteins show resistance to both enzymes as with N-glycans from C. elegans with the unusual Gal-b-(1 ! 4)-Fuc at the 3- and 6positions. In this case, hydrazine was used instead (Hanneman et al., 2006). Endo D from Streptococcus pneumoniae has been reported to hydrolyze the core of complex N-glycans between the GlcNAc residues, unlike Endo-H that preferentially hydrolyzed high-mannose structures (Yamamoto, Muramatsu, & Muramatsu, 2005). As an alternative to endoglycosidase release, Liu et al. (2006a) have used pronase E at high concentration and at extended time periods (up to 72 hr) to reduce the protein or glycoproteins to single amino acids with only Asn attached to the N-glycans. The resulting glycopeptides were then permethylated under which conditions the Asn underwent b-elimination to give a stable product. Pronase is much cheaper than PNGase, the usual enzyme used for glycan release and the method produced excellent results with ribonuclease B, chicken ovalbumin and avidin. New linear glycans were also identified from Campylobacter jejuini. Another high-throughput method for release and analysis, with full experimental details has been described by Keck, Briggs, and Jones (2005). In-gel methods: A method for examination of N-glycans from plasma glycoproteins has been reported (Sagi et al., 2005), basically following the in-gel method earlier described by Küster et al. (1997) but with a few modifications. Clean-up of the glycans was effected with graphatized carbon mini-cartridges rather than with the three-bed resin technique described by Küster et al. and the method was shown to be compatible with silver-stained SDS–PAGE gels. Sialylated glycans were examined in linear TOF mode to minimize observed losses of sialic acids and THAP was shown to be the best matrix, broadly in line with previous observations. Alternatively, the acids were stabilized by methyl 27 & HARVEY ester formation (Powell & Harvey, 1996). Quantitation was initially performed by HPAEC-PAD but the glycan profiles of the methyl esters were shown to be comparable with the exception of the trisialo-triantennary glycan that gave a weaker signal by MALDI analysis. The method was applied to investigations of congenital disorders of glycosylation. On-target methods: High-mannose glycans have been detected and characterized from endo-polygalacturonase A from Aspergillus niger by MALDI-TOF mass measurements before and after on-target digestion with Endo-H and/or a-mannosidase (Woosley et al., 2006a,b) and a MALDI-TOF profile of glycoforms of recombinant human thyrotropin (31 kDa) has been obtained after enzymatic desialylation on the MALDI plate (Morelle et al., 2006b) with DHB as the matrix. Other enzymatic release methods: Palm and Novotny (2005) have immobilized PNGase F on a porous polymer-based monolithic capillary column that included N-acryloxysuccinimide for enzyme immobilization. The reduced, but not alkylated, glycoproteins, ribonuclease B, asialofetuin and ovalbumin, were passed through the column and deglycosylation was reported to be complete in seconds to a few minutes from 0.1 to 20 mg of glycoprotein. The enzyme activity was reported to be reproducible for at least 8 weeks. No cleanup was needed for the released glycans to give good signals when examined by MALDI-TOF from DHB. Although the system worked well for small and medium-sized glycoproteins, the authors had some reservations about its effectiveness for larger glycoproteins. However the possibility of direct interfacing with HPLC was proposed. d. N-glycan profiling. Matrix-assisted laser desorption/ionization (MALDI), with its production of only singly charged ions from N-glycans remains the best mass spectrometric method for glycan profiling. Although some investigators prefer ESI or LC/ MS-based methods, claiming that they provide more consistent long-term reproducibility and are able to record spectra of sialylated glycans, ESI spectra can present the analyst with several problems. Frequently, multiple ions, such as [M þ H]þ and [M þ Na]þ are produced in positive ion mode and a number of anionic adducts, some not identified, are frequently formed when negative ion spectra are acquired. Furthermore, ESI spectra can also contain multiply charged ions and abundant in-source fragments, some of which (Y-type ions) are isobaric with native glycans. MALDI-TOF spectra of neutral glycans, on the other hand, although often containing [M þ K]þ ions in addition to the normal [M þ Na]þ species, are usually free of these problems although it should be noted that acidic glycans can still present problems as the result of in- and post-source fragmentation. Many examples of the use of MALDI analyses are listed in Tables 4 and 5. Following analysis by MALDI-TOF–MS, Monk et al. (2006) have added a word of caution about the true glycosylation of T cells when they noted that, despite stringent washing, CD25þ and CD25 CD4þ T cells may sequester glycans from the culture medium, thereby yielding unrepresentative N-glycan profiles and false inferences about endogenous glycosylation patterns. Some glycans appeared to originate from glycoproteins in fetal calf serum and were absent from cells prepared in phosphate-buffered saline (PBS). Glycans from cells grown in serum-free media were intermediate between these two 28 examples suggesting that commercial serum-free media appears to contain glycoproteins that are also sequestered by T cells. Although the masses measured by MALDI analysis lead directly to the glycan composition in terms of its monosaccharide content, information on the nature of the monosaccharides, many of which are isobaric, is lacking from MALDI spectra and must be obtained by additional techniques such as exoglycosidase sequencing. Although usually performed as a separate operation, some investigators carry out such digestions directly on the MALDI target. Thus, for example, Faid et al. (2006) have performed digestions in sodium phosphate buffer and DHB matrix. Reactions terminated by addition of the matrix. Sulfated and phosphorylated glycans have the same nominal mass and are not resolved with low resolution TOF instruments. However, it has been reported that they can be differentiated by MALDI-TOF because sulfated glycans are invariably detected as their sodium salts (the free sulfates presumably having been eliminated) whereas phosphates can be observed as the free acids (Fig. 3) (Harvey & Bousfield, 2005). e. Applications of MALDI to the detailed structural determination of N-linked glycans. Most of this work is summarized in Tables 4 and 5 and in the section on biopharmaceuticals (Table 16). Only work leading to the identification of some of the more unusual glycans is reported here. Long fucosylated poly-N-acetyllactosamine chains have been characterized in tetra-antennary glycans of mannan-binding lectin on the surface of human colorectal carcinoma SW1116 cells. They were thought to be responsible for binding to microbes (Terada et al., 2005). In-source fragmentation and MALDI-Q-TOF CID analyses were used in their structural identification. Geyer et al. (2005) have identified several novel N-glycans from keyhole limpet hemocyanine in a study of cross-reactivity with glycoconjugates from Schistosoma mansoni. Most glycans were paucimannosidic, high-mannose, or hybrid but unusual features included one and two galactose residues attached to the a-(1 ! 6)linked core fucose (31, 32) and galactose attached directly to the antennae-mannose residues (33). Glycans from the worm stage of this parasite have been found to be biantennary with the antennae consisting of repeats of GalNAc-b-(1 ! 4)[Fuc-a(1 ! 3)]GlcNAc-b(1 ! 3) (Wuhrer et al., 2006b). C. elegans has N-glycans with Gal-b-(1 ! 4)-Fuc in both 3- and 6-positions of the core GlcNAc (Hanneman et al., 2006), as determined by MSn fragmentation with a MALDI-Q-TOF instrument. The glycans also contain phosphorylcholine (3/11) substitution. MALDI-QTOF–MS/MS and PSD have shown that glycan profiles in this species are different at each developmental stage (Cipollo et al., 2005). Young larvae were shown to possess N-acetyllactosamine extensions to the antennae not seen in adults. PSD analysis showed that phosphocholine could be substituted on either core or terminally linked GlcNAc, structures not yet seen in any other organism. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & FIGURE 3. Positive ion MALDI-TOF spectra of (a) N-glycans from equine luteinizing hormone recorded from DHB and (b) the same sample after incubation with alkaline phosphatase. Key to symbols: (&) GlcNAc, (*) mannose, (}) galactose, ( ) fucose, (^) GalNAc. From Harvey and Bousfield (2005) with permission from John Wiley and Sons Ltd. Linear glycans of Glc1GalNAc5 attached to Asn by bacillosamine (2,4-diamino-2,4,6-trideoxy-D-glucose 34) have been identified in the bacterium Campylobacter jejuni 11168H (Liu et al., 2006a). The enzyme PglC has been shown to be responsible for synthesizing undecaprenyl pyrophosphate bacillosamine, an intermediate in the biosynthesis of N-linked glycans in this bacterium (Glover et al., 2006) and the compound has been synthesized (Weerapana et al., 2005). Sulfated high-mannose glycans have been identified by negative ion MALDI-TOF analysis with nor-harmane as the matrix for the first time in Trypanosomatids; they were found in the glycoprotein crusipain from Trypanosoma cruzi (Barboza et al., 2005). Biantennary glycans with N-acetyllactosamine extensions to the antennae were also found. The nematode Trichinella spiralis has been found to synthesizes tetra-antennary glycans whose antennae are capped with tyvelose (3,6-dideoxy-arabino-hexose, 1/15) (Bruce & Gounaris, 2006). f. Glycoproteomics. Uematsu et al. (2005) have developed a deuterated reagent, caoWR, Na-((aminooxy)acetyl)tryptophanylarginine methyl ester (35) for labeling N-glycans for proteomic studies and used it to compare glycans released from murine Mass Spectrometry Reviews DOI 10.1002/mas dermis and epidermis. The dermal glycans were labeled with the 2 H3 version of the derivative while the epidermal glycans received the protonated form. High-mannose glycans were found to be characteristic of epidermal glycoproteins. 3. O-Linked glycans a. Determination of site occupancy. New methods for the determination of the site of attachment of O-glycans have been reported. Thus, a method based on the ladder sequencing technique developed by Chait et al. (1993) has been developed by Suzuki et al. (2006d). The glycopeptides were reacted with a mixture of phenylisocyanate and phenylisothiocyanate and then reacted with TFA in methanol under mild conditions to remove the terminal residue from the phenylisothionate derivative (the phenylisocyanate derivative was stable). The cycle was then repeated several times to produce a ladder of glycopeptides/peptides capped with phenylisocyanate which 29 & HARVEY FIGURE 4. MALDI-TOF–MS spectra of a synthetic glycopeptide after five repeated ladder sequencing cycles under mild acid hydrolysis conditions. The ions with ~ and ^ indicate methylated ions and sodium adduct ions, respectively. From Suzuki et al. (2006d) with permission from the American Chemical Society. were examined by MALDI-TOF to give a spectrum from which the peptide sequence and glycosylation could be determined (Fig. 4). The O-linked site of adenovirus type 5 fiber protein has been located by a two-stage process. Proteolysis with trypsin and Glu C localized the site to the Ile101 –Glu110 peptide and subsequent b-elimination of the attached GlcNAc with a mixture of 2-propanol/dimethylamine/ethanethiol indicated Ser-109 as the attachment site. The b-elimination procedure added 44 mass units to the originally glycosylated amino acid which was detected by MALDI-TOF–MS (Cauet et al., 2005). b. Release of O-linked glycans. b-Elimination is still the preferred method for releasing O-glycans. The classical technique, involving sodium hydroxide, gives a solution from which much sodium must be removed. A modification, using ammonium hydroxide as the base, introduced by Huang et al. (2002) gives a cleaner product and has been used by Steiner et al. (2006) to release S-layer O-glycans from Geobacillus stearothermophilus. Clean-up was with a carbon column. Taylor, Holst, and Thomas-Oates (2006) have developed a method for reductive b-elimination to release O-glycans from within SDS– PAGE gels, stained either with Coomassie blue or silver. The glycans were released with sodium borohydride and sodium hydroxide at 508C for 16 hr before being extracted with water. Glycans from as little as 5 mg of glycoprotein could be analyzed. The method was developed with bovine submaxillary gland glycoproteins and then applied to glycans from Mycobacterium avium capsular proteins. c. Applications of MALDI to the structural determination of O-linked glycans. Work on this topic is mainly summarized in Tables 6 (specific glycoproteins) and 7 (tissues and organisms). Only a few examples of the more unusual compounds are given here. Thus, a novel glycoprotein, named Flagellasialin, found in 30 the sperm flagella of sea urchin contains glycosylation at eight of the possible twelve sites. The glycans consist of three a2 ! 9linked sialic acids (Neu5Ac), terminating in sulfate and attached at the 6-position to a GalNAc residue which is attached to the protein (Miyata et al., 2006). MALDI-TOF analysis was used to define the glycosylation sites after desialylation. Two new O-glycans, GalNAc and Gal-b-(1 ! 3)-GalNAc carrying 2aminoethyl-phosphate on the 6-position of the GalNAc group have been identified in glycoproteins from the nests of the common wasp (Vespula germanica) (Maes et al., 2005). Bovine lens MP20 has been found to contain hexoses that are resistant to enzymatic cleavage. Tryptic glycopeptides were examined by MALDI-TOF/TOF–MS and their fragmentation spectra were consistent with the presence of a hexose with a C-glycosidic link to tryptophan (Ervin et al., 2005). Bacterial glycoproteins are rare but MALDI-TOF–MS has assisted in the identification of heptose residues in the autotransporter protein Ag43 from E. coli (Sherlock et al., 2006). i. Glycosaminoglycans (GAGS) and related compounds. MALDI-TOF–MS has been used to determine nanogram amounts of defined hyaluronan oligomers obtained by enzymatic digestion of high molecular weight hyaluronan with testicular hyaluronate lyase (Busse et al., 2006). Stronger signals were obtained in negative ion mode than positive but the signal-tonoise (S/N) ratio in both modes was found to be a reliable measure of the amount deposited onto the target. An amount as low as approximately 40 fmol could be determined and there was a linear correlation between the S/N ratio and analyte between approximately 0.8 pmol and 40 fmol. However, the detection limits depended considerably on the size of the oligomer with larger oligomers being less sensitively detectable. The use of the liquid matrices consisting of 1-methylimidazolium a-cyano-4hydroxycinnamate and butylammonium 2,5-dihydroxybenzoate for analysis of GAGS (Laremore et al., 2006) has been mentioned above. Other studies are summarized in Table 8. Mass Spectrometry Reviews DOI 10.1002/mas & TABLE 6. Use of MALDI–MS for examination of O-glycans from specific glycopeptides ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 31 32 Instrumentation (matrix and additive). 1 TABLE 8. Use of MALDI–MS for examination of glycosaminoglycans and related compounds Instrumentation (matrix), other techniques, sample (derivatives). 1 TABLE 7. Use of MALDI–MS for examination of O-glycans from intact organisms or tissues & HARVEY Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES 4. GPI Anchors A combination of hydrophilic interaction liquid chromatography and MALDI-Q-TOF has been used to characterize glycosylphosphatidylinositol (GPI)-anchored peptides (Omaetxebarria et al., 2006). GPI-anchor-specific diagnostic ions were observed by MS/MS at m/z 162, 286, 422, and 447, corresponding to glucosamine, mannose ethanolamine phosphate, glucosamine inositol phosphate, and mannose ethanolamine phosphate glucosamine, respectively. This method was used for analysis of GPI peptides derived from low picomole levels of the porcine kidney membrane dipeptidase. 5. Glycoproteins and Disease Matrix-assisted laser desorption/ionization (MALDI)–MS is being increasingly used to detect changes in glycosylation accompanying various disease states with the aim of identifying possible biomarkers for disease detection and/or monitoring. Thus, Morelle et al. (2006c) have described a method for qualitative analysis of N-glycosylation of human serum proteins as a method for detecting disease biomarkers. N-linked oligosaccharides were released from patient serum glycoproteins with PNGase F and cleaned with a graphitized carbon column. Half of the sample was desialylated with hot acetic acid and the other half was reacted with methyl iodide to stabilize the sialic acids. Samples are then examined by MALDI-TOF–MS. A parallel structural study of the released oligosaccharides involved exoglycosidase digestions, linkage analysis, and electrospray ionization ion trap mass spectrometry (ESI-IT-MS) of permethylated glycans. Twenty-six, mainly complex glycans were identified. Application to patients with cirrhosis showed an increase in bisecting N-acetylglucosamine residues and core fucosylation. a. Cancer. Monitoring human serum for glycoproteins that could be used as markers for cancer has been investigated by a number of laboratories. An et al. (2006a) have used MALDI– FTICR–MS to look for glycans specific to ovarian cancer and have noted at least 15 peaks in their spectra that appear to be associated with the tumor. Several of the ions, many of which appear to be fragments, were isolated and fragmented further using IRMPD to determine their structure. Zhao et al. (2006) have used lectins to monitor the distribution of a-(2 ! 3)- and a-(2 ! 6)-linked sialic acid in serum from cancer patients and controls. Changed glycoproteins were identified and the glycosylation sites and glycan structures were identified by LC-MS/MS and MALDI-TOF–MS. The method was applied to serum from pancreatic cancer patients where Asn-83 glycosylation of a1-antitrypsin was found to be down-regulated. Increased a-(1 ! 3)-fucosylation of complex and, in particular, triantennary glycans (36) from a1-acid glycoprotein have been observed in cases of inflammation and the inflammation associated with conditions such as rheumatoid arthritis and cancer (Higai et al., 2005). Glycopeptides were obtained by GluC digestion from the glycoprotein that had been isolated from serum and examined by HPLC. Glycans from the five N-linked glycosylation sites were released with PNGase F and MALDITOF analysis of desialylated glycans showed an increase in Mass Spectrometry Reviews DOI 10.1002/mas & biantennary glycans and of a-(1 ! 3)-fucosylated glycans at each site. Increased fucosylation of haptoglobin has been identified and proposed as a biomarker for pancreatic cancer (Okuyama et al., 2006). Naka et al. (2006) have devised a strategy involving release of N-glycans from cell membrane fractions, labeling with 2-AB, fractionating according to the number of sialic acids by serotonin affinity chromatography, desialylating, further fractionating by normal-phase HPLC and identifying the resulting glycans by MALDI-TOF–MS. Application of the method allowed the investigators to detect glycans with poly-N-acetyllactosamine chains from histocytic lymphoma cells and hyperfucosylated glycans from gastric adenocarcinoma cells. Pochec et al. (2006) have detected increased amounts of sialylated tetra-antennary glycans in a3b1-integrin from a human bladder carcinoma cell line and shown that the glycoprotein exhibits significantly higher binding than integrin from normal epithelial cells in a ligand-binding assay. N-glycolylneuraminic (37) acid has been identified as its 1,2-diamino-4,5-methylenedioxybenzene (DMB, 38) derivative by MALDI-TOF–MS from ferritin obtained from human hepatocarcinoma tissue. This acid is not synthesized by humans and its origin from some external source was postulated (Asakawa et al., 2006). SELDI protein chip technology and its use in proteomic approaches to the detection of disease biomarkers, with emphasis on cancer diagnosis has been reviewed (Xiao et al., 2005). b. Congenital disorders of glycosylation (CDGs). The use of MALDI-TOF–MS for screening for CDGs has been summarized in a review of known diseases of this type (Freeze & Aebi, 2005) and Wada (2006) has also published a review on the use of mass spectrometry for studying CDGs. A method for in-gel-release of N-glycans from plasma glycoproteins from CDG patients has been described above and applied to cases of CDG-IIx and HEMPAS (Sagi et al., 2005). c. Alcohol abuse. A review including the use of MALDI-TOF for the detection of carbohydrate-deficient transferrin as a marker of alcohol abuse has been published (Bortolotti, De Paoli, & Tagliaro, 2006). Elevated levels of carbohydrate-deficient transferrin have become used as a marker for prolonged overconsumption of alcohol and an immunological test kit (Axis-Shild %CDT) is available. However results from the kit differ from 33 & HARVEY those obtained by HPLC. MALDI-TOF analysis of the transferrin showed a considerable amount of tri-sialo-transferrin that was not supposed to be present and which probably accounted for the discrepancy between the two results (Aldén et al., 2005). A comparison of MALDI-TOF and ESI-Q-TOF analyses for detecting glycosylation differences of transferrin in chronic alcohol abuse has concluded that the ESI-Q-TOF approach is superior on account of its higher resolution (del Castillo Busto et al., 2005). Other studies are summarized in Table 9. 34 Format: Instrument (matrix) other technique sample (derivative). 1 A review on the importance of measuring products of nonenzymatic glycation of proteins has been published (Lapolla, Traldi, & Fedele, 2005) and the same group has published updates on the role of mass spectrometry in the study of protein glycation in diabetes (Lapolla et al., 2006) and related diseases (Lapolla, Fedele, & Traldi, 2005). Although detection of advanced glycation end-products (AGE)-modified proteins is ideally detected by MALDI-TOF–MS, detailed structural analysis is not possible because of the broad, usually unresolved peaks. To overcome the problem, Kislinger et al. (2005) used peptide mapping of Glu C digestion products and have detected, for example, methylimidazolone (39) and argpyrimidine (40) attached to arginine and carboxyethyl (41) bound to lysine on the peptide KVFGRCE from lysozyme when incubated with methylglyoxyl (3/12). Other examples are given in the article. Glycated peptides also occur naturally as the result of in vivo proteolysis. In a study of such systems, model glycated peptides were obtained from glycated proteins by proteinase K, endo-Lys C or trypsin digests and examined by both MALDI-TOF and LC/MS. Although the two techniques gave comparable results, MALDI detected several products that were not seen by LC/MS (Lapolla et al., 2005b). Glu C digestion and MALDI-TOF analysis were also used by Farah et al. (2005) to show that insulin could be glycated at two sites on exposure to glucose; the glycated insulin was enriched with magnetic beads containing immobilized 3-aminophenylboronic acid (42). Mennella et al. (2006) have studied the effect of vicinal amino acids on the reactivity of lysine towards various carbohydrates. The presence of hydrophobic amino acids, such as Ile, Leu, and Phe strongly increased reactivity. Contrasting results were obtained with basic residues. The Lys–Arg dipeptide was among the most reactive while the Lys–Lys was not. MALDI-TOF–MS was stated to be particularly useful for product monitoring. TABLE 9. Use of MALDI–MS for examination of glycosylation in disease C. Glycated Proteins (Non-Enzymatic Attachment of Sugars) Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & automatic sample spotting and applied to a group of 184 individuals. Articles relating to more biologically targeted projects are listed in Table 10. D. Glycolipids 1. Lipopolysaccharides (LPS) Studies on these compounds are summarized in Table 11. The fragmentation behavior of D-glucose- (1/4) and Dribose- (1/1) derived Amadori peptides as well as D-fructose(1/7) derived Heynes peptides have been studied by ESI- or MALDI-CID (Frolov, Hoffmann, & Hoffmann, 2006). All three sugar moieties displayed characteristic fragmentation patterns which could be explained by consecutive losses of water and formaldehyde. Glucose-derived Amadori products showed losses of 18, 36, 54, 72, and 84 mass units whereas ions from the D-fructose products contained an additional loss of 96 units. Ribose-conjugated peptides lost 18, 36, and 54 units. Each compound yielded diagnostic lysine-derived immonium ions that were successfully used in a precursor ion scan analysis to identify Amadori peptides in a tryptic digest of bovine serum albumin (BSA) glycated with D-glucose on lysines 36, 160, 235, 256, 401, and 548. Optimization of conditions for obtaining maximum sequence coverage of proteins for studies of various modifications such as glycation have been performed by Wa, Cerny, and Hage (2006) with human serum albumin (HSA) as a model protein. A mixture of CHCA and DHB was employed as the final matrix. This matrix, when used with a tryptic digest, gave information on only half of the peptides. However, the combined use of three enzyme digests, trypsin, endoproteinase Lys-C, and endoproteinase Glu-C increased this sequence coverage to 72.8%. The use of a ZipTip to fractionate peptides in these digests increased the sequence coverage to 97.4%. By use of this optimized procedure Lys199 was confirmed as a glycation site on normal HSA, whereas Lys-536 and Lys-389 were identified as additional modification sites on minimally glycated HSA. In a study of tryptic peptides from glycated HSA, Brancia et al. (2006) have shown that DHB is a more effective matrix than CHCA leading to an increase in the coverage of the glycated protein. It was found that, regardless of the high glucose concentration employed for HSA incubation, glycation does not go to completion. Tandem mass spectrometric data suggested that the CID of singly charged glycated peptides leads to specific fragmentation pathways related to the condensed glucose molecule. The authors suggest that the specific neutral losses derived from the activated glycated peptides can be used as a signature for establishing the occurrence of glycation processes. A quantitative method for measuring glycated and glutathionylated hemoglobin using linear MALDI-TOF with a sinapinic acid matrix has been developed by Biroccio et al. (2005) and shown to give results in good agreement with HPLC measurements. The method was developed by the use of Mass Spectrometry Reviews DOI 10.1002/mas a. Intact LPS. These complex molecules often require elaborate methods of sample preparation in order for them to produce strong signals but, even so, spectra can only be obtained from the smaller molecules. Larger compounds are examined after splitting into smaller fragments; usually the lipid A portion and the repeat units of the O-chain. Because of the normally high amount of phosphate, spectra are normally recorded in negative ion mode from a variety of matrices although, as with other carbohydrates, DHB appears to be the most popular. However, Choudhury, Carlson, and Goldberg (2005) have found that the phosphorylated oligosaccharides from P. aeruginosa serogroupO11 gave better negative ion signals from 3-AQ than from DHB. Phosphates can be neutralized by methylation such as with MeOH/HCl as used by Silipo et al. (2005d) in a study of lipooligosaccharides (LOS) from Arenibacter certesii KMM 3941T. Sturiale et al. (2005b) have optimized conditions for obtaining strong signals from bacterial rough (R-type) LPS and found that, in addition to [M H] ions, the spectra contained abundant ions originating from cleavage between the Kdo moiety and the lipid A (Fig. 5). Sample preparation involved suspending the LPS in a mixture of methanol/water (1:1) containing 5 mM ethylenediaminetetraacetic acid (EDTA, 43) with sonication to aid dissolution. A few microliters of the solution was desalted on a small piece of Parafilm1 with some grains of Dowex 50WX8200 cation-exchange beads that had been converted into the ammonium form. 0.3 mL of this solution was transferred to the MALDI target along with the same volume of dibasic ammonium citrate in a thin layer with the matrix solution that consisted of THAP (200 mg/mL) in methanol and nitrocellulose (15 mg/mL in acetone/propanol (1:1 by volume)) mixed in a 4:1 ratio. The method was illustrated by spectra of LPS from Shewanella pacifica, Xanthomonas campestris, and Pseudoalteromonas issachenkonii. A similar method for preparing the MALDI target was used by Liparoti et al. (2006) in the first report of b-Kdo in the inner core of LPS from Alteromonas macleodii ATCC 27126. Procedures such as alkaline and acid hydrolysis, mild hydrazinolysis (de-O-acylation) followed by de-N-acylation with hot KOH were used. Another first report is of the discovery of an enzyme that hydrolyses one of the two KDO residues that are attached to the tetra-acylated lipid A precursor of Helicobacter pylori LPS (Stead et al., 2005). 35 & HARVEY TABLE 10. Use of MALDI–MS for the study of glycated proteins 36 Mass Spectrometry Reviews DOI 10.1002/mas & TABLE 11. Use of MALDI–MS for examination of bacterial glycolipids ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 37 HARVEY (Continued ) & 38 Mass Spectrometry Reviews DOI 10.1002/mas & TABLE 11. (Continued ) ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 39 HARVEY TABLE 11. (Continued ) & 40 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES b. Lipid A. The CID fragmentation of KDO2-lipid A (44) has been briefly reviewed (Murphy et al., 2005). A new method for obtaining lipid A from whole bacterial cells involves stirring the cells with isobutyric acid/ammonium hydroxide for 2 hr at 1008C, washing the product with methanol and extracting the lipid A with chloroform/MeOH/water (3:1.5:0.25 by volume) (El Hamidi et al., 2005). The method avoids the usual hot phenol extractions and produces very little decomposition. It was applied to lipid A from Haemophilus influenzae and Bordetella holmesii. DHB, THAP, and ATT with ammonium citrate appear to be the preferred matrices for these compounds but Casabuono et al. (2006) have obtained better spectra with nor-harmane as matrix than with DHB for studies of Lipid A from Mesorhizobium loti. Considerable heterogeneity was present in the spectra as the result of different chain lengths of the acyl groups c. Medical aspects. Matrix-assisted laser desorption/ionization (MALDI)-TOF–MS has been reported to be better than Mass Spectrometry Reviews DOI 10.1002/mas & some other methods for detecting subtle differences in isogenic strains of Staphylococcus aureus differing in their resistance to methicillin or teicoplanin. More important changes in MALDI-TOF–MS spectra were found with strains differing in methicillin than in teicoplanin resistance (Majcherczyk et al., 2006). 2. Glycosphingolipids (GSL) These compounds can be examined intact by MALDI–MS or the sugar portion can be removed enzymatically to reduce heterogeneity caused by the lipid as exemplified by the release of pseudo-LewisY glycolipids of S. mansoni cercaria by endoglycoceramidase II (from Rhodococcus spp.) (Meyer et al., 2005). A semi-quantitative method for the determination of intact glycosphingolipids using sphingosylphosphorylcholine (45) as the internal standard and monitoring by MALDI-TOF–MS from DHB has been developed for detecting GSLs deposited in Fabry disease (Fujiwaki et al., 2006). It was used to study deposition of 41 & HARVEY FIGURE 5. Negative ion MALDI-TOF mass spectrum of native R-type LPS from Pseudoalteromonas issachenkonii. From Sturiale et al. (2005b) with permission from John Wiley and Sons Ltd. ceramide trihexoside (CTH, 46) in cardiac valves. Deuterated standards for quantification of several GSLs have been synthesized and evaluated by ESI MS (Mills et al., 2005). Thin-layer chromatography (TLC) has been coupled directly with a commercial orthogonal-MALDI-TOF instrument for the analysis of gangliosides (Ivleva et al., 2005). The matrix was sinapinic acid, spotted onto the TLC plate after development of the plate. Application of a declustering potential during MALDI analysis allowed control of the matrix adducts and clusters. Stabilization of these sialylated molecules was provided by collisional cooling. Several investigators have developed methods for stabilization of sialic acids in these compounds. A method, reported by Dreisewerd et al. (2005) used the liquid matrix, glycerol, with ionization involving an Er:Yag infrared laser to provide soft ionization conditions. The ions of lower 42 internal energy produced by atmospheric pressure MALDI have also been used to advantage to record spectra of intact gangliosides without loss of the sialic acid (Zhang et al., 2005c). Nakamura et al. (2006) have also coupled TLC to a MALDI-QITTOF instrument and used it to record MS2 and MS3 spectra of glycosphingolipids. Ions characteristic of both sugar and lipid portions were obtained. The matrix, DHB, was coated onto a target in 1:1 acetonitrile/water and spectra were recorded from the regions that a parallel stained plate indicated contained sample. TLC plates directly stained with primuline also yielded spectra. Suzuki et al. (2006c) have reported that the use of lithium adducts, increased laser power and a cooling gas flow can increase the abundance of the fragment ions in this QIT system. Other studies on glycosphingolipids are listed in Table 12. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & 3. Mycobacterial Glycolipids Glucose monomycolate is synthesized by mycobacteria upon infection. Enomoto et al. (2005) have shown up-regulation of synthesis at 308C. The compounds, with a variety of mycolic acids from Mycobacterium smegmatis were identified by MALDI-TOF–MS after isolation by TLC. Trehalose (3/39) is a prerequisite for the production of mycolates that are important constituents of mycobacterial cell walls. Corynebacterium glutamicum, a mutant that is unable to synthesize trehalose is, nevertheless able to synthesize mycolates when grown on other glucose-containing oligosaccharides. The compounds, analyzed by MALDI-TOF and NMR contained one mycolic acid chain attached to C6 of the reducing-terminal glucose (Tropis et al., 2005). Cord factor (trehalose-6,60 -dimycolate) from nine species of mycobacteria has been successfully analyzed by MALDI-TOF–MS (Fujita et al., 2005c). Spectra were very complicated (Fig. 6) because of the heterogeneity in both mycolic acid chains. E. Glycosides and Other Natural Products Much work on glycosides relies on ESI or FAB ionization with fewer applications involving MALDI–MS. However, the technique is still valuable in this context as illustrated by the work summarized in Tables 13 and 14. TABLE 12. Use of MALDI–MS for examination of glycosphingolipids X. GLYCOSYLATION AND OTHER REACTION MECHANISMS Mass Spectrometry Reviews DOI 10.1002/mas Work involving glycosidases and glycosyl-transferases where MALDI–MS has mainly been used for product characterization, is summarized in Table 15. Freire, D’Alayer, and Bay (2006) have reported that SELDI-TOF is a very convenient analytical method for monitoring bioconjugation reactions. The transglycosylation reaction of GlcNAc to a recombinant mucin protein, MUC6, catalyzed by ppGalNAc transferases were used. XI. INDUSTRIAL APPLICATIONS A. Biopharmaceuticals The growing trend towards the production of biopharmaceuticals has resulted in studies in a large range of organisms such as the legume Medicago truncatula that has recently been proposed, on the bases of MALDI-TOF analysis, as promising for the production of these pharmaceuticals (Abranches et al., 2005). Some of these organisms produce non-human glycosylation which can be antigenic and much work has been reported on the use of genetic engineering to remove the enzymes responsible for biosynthesis of antigenic glycans, predominantly those containing 1 ! 2-linked xylose and a-galactose, and to introduce enzymes that synthesize human-type glycosylation. Plant and insect cells are frequently used as bioreactors and a review by Harrison and Jarvis (2006) addresses N-glycosylation in baculovirus-insect expression systems and the engineering of 43 & HARVEY FIGURE 6. MALDI-TOF mass spectrum of trehalose 6,60 -dimycolate, from Mycobacterium tuberculosis H37Rv recorded from DHB. From Fujita et al. (2005c) with permission from the Society for General Microbiology. insect cells to produce ‘‘mammalianized’’ recombinant glycoproteins. Thus, for example, IgG1, human embryonic kidney (HEK) cells transfected with GlcNAc-TIII produce glycans with bisecting GlcNAc (Schuster et al., 2005). LEC10b mutant Chinese hamster ovary (CHO) cells have been shown to be the cell line of choice for producing recombinant glycoproteins whose glycans contain a bisecting GlcNAc (Stanley et al., 2005). Production of monoclonal antibodies (IgG) represents a major investment by many biopharmaceutical companies. Several new methods have been developed for their analysis. Thus, Bailey et al. (2005) have described a method for rapid and high-throughput analysis of recombinant monoclonal antibodies (MAbs) and their post-translational modifications. MAb capture, desalting and in situ reduction/alkylation were accomplished by sequential adsorption of the analyte onto solid-phase beads suspended in microtiter plate wells. The antibodies were eluted and digested with trypsin in the presence of the acid-labile surfactant RapiGestTM and the resulting peptides were fractionated by stepwise elution from reverse-phase pipette tips. The fraction containing Fc N-glycopeptides was isolated and analyzed by linear MALDI-TOF–MS. The results were in good agreement with those obtained by normal phase HPLC analysis of fluorophore-labeled N-glycans released by PNGase F. A comparison of three techniques, ESIMS, MALDI-TOF–MS, and anion-exchange chromatography with fluorescence (2-AA) detection for quantitative analysis of the galactosylation present on immunoglobulins has been published by Siemiatkoski et al. (2006). A recombinant monoclonal IgG was enzymatically modified in vitro to produce completely galactosylated and degalactosylated forms of the immunoglobulin. Samples of known galactosylation levels were prepared by mixing the modified forms with the native form. Good repeatability and linearity were demonstrated for all three assays (RSDs <1.0%, correlation coefficients >0.99) which were evaluated in terms of repeatability, limit of quantitation, selectivity, and linearity. The 44 MALDI-TOF assay was best at identification of afucosylated glycoforms but was inferior to the others for analysis of sialylated compounds. Other work on antibodies is summarized in Table 16. Several studies on recombinant erythropoietin (EPO) have been reported (see Table 16). EPOs from various manufacturers differ in several respects, but predominantly in glycosylation. All samples contain, as their major N-glycan, sialylated tetraantennary compounds. Aranesp (NESP), however, contains a large percentage of O-acetylated sialic acids (Stübiger et al., 2005a), unlike EPO from other sources. Stübiger et al. (2005b) have also used MALDI-TOF–MS to study the intact molecules and found that Aranesp has a significantly higher molecular weight (36.6 kDa) than the other two samples (Erypo and NeoRecormon) used in the experiment as the result of its additional two N-glycosylation sites (Sanz-Nebot et al., 2005). The neutral glycoforms could be resolved after desialylation and after N-glycans had been removed, the MALDI-TOF spectra revealed the profile of the O-glycosylated glycoproteins. Use of an ionene-dynamically coated capillary in a CE-MS system has separated three glycoforms of EPO; molecular weights were verified by MALDI-TOF–MS (Yu et al., 2005a). MALDI-TOF has also been used to differentiate rhEPO (29 kDa from Research Diagnostics, Flanders, NJ) from darbepoietin (36 kDa, a product from Amgen, Thousand Oaks, CA) in spiked horse plasma (Gupta, Sage, & Singh, 2005). Four immunoassay based methods detected both EPOs but could not differentiate them and three also cross-reacted with equine EPO. MALDI-TOF analysis has been used to compare five commercial samples of prostate-specific antigen (PSA) with certified reference material (CRM 613) from the European Commission Community Bureau of Reference. All samples showed a different profile but appeared relatively stable; no evidence for the presence of degrading enzymes was found (Satterfield & Welch, 2005). Other work on biopharmaceuticals is summarized in Table 16. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & TABLE 13. Use of MALDI–MS for examination of glycosides Mass Spectrometry Reviews DOI 10.1002/mas 45 & HARVEY TABLE 13. (Continued ) B. Agriculture 1. Nodulation (NOD) Factors from Rhizobial Bacteria The microsymbiont Rhizobium gallicum is a fast-growing bacterium found in European, Australian, and African soils which is able to nodulate plants of the genus Phaseolus. It produces four extracellular signal molecules, NOD factors (3/31) whose structures have been elucidated by FAB, LSIMS, and MALDI-Q-TOF–MS together with GC/MS. The NOD factors consist of a linear GlcNAc backbone with an N-methyl group on the reducing terminal and different N-acyl substituents. The four acyl-oligosaccharides terminate with a sulfated N-acetylglucosaminitol (Soria-Dı́az et al., 2006). Rhizobium tropici is a nodulator of bean growing in areas characterized by highly acidic soils. In this work, acidity was found to increases rhizobial NOD factor production. Significant differences were observed between the structures produced at acid and neutral pH: 52 different molecules were produced at acid pH, 29 at neutral pH, and only 15 are common to bacteria grown at pH 7.0 or 4.5. Structural identification was by a combination of MALDI-TOF, FAB, and ESI MS. The results indicate that R. tropici CIAT899 has successfully adapted to life in acidic soils and is a good inoculant for the bean under these conditions (Morón et al., 2005). 2. Other Studies Hydroxyethylmethylcelluloses, prepared from cellulose by the action of oxirane and methyl chloride are widely used in industry as thickeners and emulsifiers. A new quantitative method for locating the methyl and hydroxyethyl groups which overcomes the strong discrimination of relative ion intensities caused by 46 hydroxyalkyl groups and enables quantitative determination of the oligomer composition after random degradation for the first time has been developed. The method involves perdeuteriomethylation; partial acid hydrolysis; reductive amination with propylamine; and, finally, permethylation to yield completely O- and N-alkylated, permanently charged oligosaccharides. Although the methyl pattern can be determined by electrospray ionization with an ion trap and MALDI-TOF–MS, only MALDITOF–MS was found to produce quantitative results (Adden et al., 2006b). Distribution of hydroxyethyl (HE) groups matches with a random distribution calculated from the monomer composition, whereas the methyl pattern was heterogeneous to a different extent (Adden et al., 2006c). A similar methylation technique has been used to investigate hydrolysis of six methylcelluloses by an enzyme preparation from Trichoderma longibrachiatum (Adden et al., 2006a). Additional examples of work with large plant polysaccharides are included in Table 1. XII. CARBOHYDRATE SYNTHESIS Reviews published during the review period include those on enzymatic polymerization of polysaccharides (Kobayashi & Ohmae, 2006), glycopeptide synthesis (Buskas, Ingale, & Boons, 2006) and protein glycosylation (Wong, 2005). Most of the publications in this area relate to routine monitoring of reaction products and are summarized in Tables 17–22. Articles reporting work mainly on method development are listed in Table 17. As mentioned in the previous review, many chemical articles ignore details of the equipment and conditions used to obtain mass spectra and frequently demote what minimal, but essential information that is supplied to ‘‘supplementary information.’’ The absence of essential information, such as the matrix used to obtain the MALDI spectra is reflected in Tables 17–21 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES (with apologies to authors from whose articles this information has been missed). In these cases, ‘‘MALDI’’ is used for articles omitting to cite the type of instrument used to record the spectra. In addition to purely chemical methods, enzymatic methods are used extensively in this area. Shimma et al. (2006) have immobilized 51 human glycosyltransferases to Pir proteins and have shown that more than 75% retained their activities. The library was used to synthesize several carbohydrates including some complex N-linked glycans. In addition to the use of glycosyltransferases, glycosidases can be used as transglycosidases as illustrated by work with human endo-b-N-acetylglucosaminidase HS (Endo-HS) which is able to transfer intact N-linked glycans to various monosaccharides (Ito et al., 2006). Endo-b-N-acetylglucosaminidase (Endo-M) from Mucor hiemalis expressed in Candida boidinii also has transglycosylation activity and is able to transfer biantennary complex-type glycan from egg yolk glycoproteins to p-nitrophenyl-N-acetyl-bD-glucosamine in organic solvents such as acetone, DMSO, or methanol (Akaike & Yamanoi, 2006). Fujita and Yamamoto (2006) have exchanged high-mannose glycans on glycoproteins by transglycosylation by using Endo-H to remove the highmannose glycans of ribonuclease B by cleavage of the chitobiose core and then Endo-M from M. hiemalis to add the complex glycan. Products were monitored by MALDI-TOF–MS from sinapinic acid. Another method for monitoring the products of enzymatic glycosylation reactions involves the use of sugars covalently linked to the surface of colloidal gold nanoparticles through a long carbon chain ending in a S–Au bond. Laser irradiation of this bond caused rupture and release of the attached sugar. Reactions were monitored by enzymatic glycosylation of the attached sugars and then recording the MALDI spectra with a LIFT-TOF/ TOF system directly from the reaction mixture—no matrix was necessary (Nagahori & Nishimura, 2006). As with the previous reviews, the two areas that are particularly suitable for special mention are large molecules such as glycodendrimers and glycoprotein conjugates. & ESI MS. Peripheral dansyl groups have also been observed to undergo some photodecomposition (Baytekin et al., 2006). MALDI-TOF analysis from IAA or dithranol of disaccharides attached to aromatic dendrimers have shown that the higher generation dendrimers tended to aggregate into spherical structures when cross-linked with 1,3-phenylene diisocyanate (47), whereas smaller molecules did not (Numata, Ikeda, & Shinkai, 2000). A variety of scaffolds have been used to construct these compounds as shown in Table 18. These include monosaccharides (Gao et al., 2005b; Lu, Fraser-Reid, & Gowda, 2005; Dubber et al., 2006a; Dubber, Sperling, & Lindhorst, 2006), cyclodextrins (Carpenter & Nepogodiev, 2005; Furuike et al., 2005; Gómez-Garcı́a et al., 2005; Hattori et al., 2006; Yamanoi et al., 2005), calix[4]arenes (48) (ten Cate et al., 2005; Dondoni & Marra, 2006; Hocquelet et al., 2006), carbosilanes (Matsuoka et al., 2006), phthalocyanines (49) (Alvarez-Mico et al., 2006), poly(amidoamine) (PAMAM) (Ibey et al., 2005; Kubler-Kielb & Pozsgay, 2005; Mangold et al., 2005; Morgan & Cloninger, 2005; Wolfenden & Cloninger, 2005; Wolfenden & Cloninger, 2006; Zhu & Marchant, 2006), peptides (Hada et al., 2005; Jin et al., 2006; Kantchev, Chang, & Chang, 2006; Sato, Hada, & Takeda, 2006), pentaerythritol (2/33) (Xue et al., 2005; Al-Mughaid & Grindley, 2006), porphyrins (50) (Laville et al., 2006; Sol et al., 2006), trihydroxybenzoic acid (51) (Fernandez-Megia et al., 2006; Joosten et al., 2006), and trimesic acid (4/61) (Patel & Lindhorst, 2006). A. Synthesis of Multivalent Carbohydrates, Dendrimers, and Glycoclusters Articles reporting work on these compounds are listed in Table 18. Self-assembly of dendrimers towards controllable nanomaterials has been reviewed (Smith et al., 2005). MALDITOF spectra of a PAMAM G10 dendrimer has been obtained with THAP as the matrix (Müller & Allmaier, 2006). Sample preparation involved vacuum drying to remove the methanol and the use of TFA/MeCN as to solvent to promote charge formation from the amine groups. Doubly (m/z 283 kDa) and triply (m/z 193 kDa) charged ions were observed, giving a mass of around 570 kDa, considerably less than that of the calculated mass of 935 kDa. The difference was attributed to incomplete synthesis highlighting the usefulness of MALDI for analyses of this type. Although MALDI–MS is usually regarded as the most reliable method for characterization of dendrimers, it has now been found that dendrimers containing sulfonamide groups at their periphery undergo some decomposition during ionization as shown by Mass Spectrometry Reviews DOI 10.1002/mas B. Synthesis of Carbohydrate–Protein Conjugates MALDI-TOF analysis, mainly in linear mode, is used extensively to monitor the coupling of carbohydrates to proteins and, in particular, to estimate the number of glycans attached. As reported in the previous reviews, the use of squaric acid is a popular method for coupling although other linkers such as adipic acid p-nitrophenyl diesters have been used. Work in this area is summarized in Table 19. 47 & HARVEY XIII. MISCELLANEOUS STUDIES MALDI-TOF–MS has been used to analyze the species involved in experiments to measure the binding properties of vancomycin-type glycopeptide antibiotics using reflectomeric interference spectroscopy (Mehlmann et al., 2005). Although the latter technique is sensitive, it cannot determine which of the components of a mixture have bound to the surface, a problem that is easily solved by MALDI–MS because each species has a unique mass. MALDI-TOF–MS has been used to measure acid-catalyzed oligomer formation of levoglucosan (1,6-anhydro-a-D-glucose), a product of combustion and which can be used to monitor long-range pollution (Holmes & Petrucci, 2006). Oligomers of up to nine residues were detected and it was proposed that they may contribute to the humic-like substances that are thought to be formed from atmospheric aerosols originating from biomass burning. Matrix-assisted laser desorption/ionization MALDI-TOF analysis showed that the antigen recognized by Meningococcal Group B polysaccharide monoclonal antibodies is a disaccharide composed of two a2-8-linked sialic acids of which one contains an N-deacyl residue (Moe, Dave, & Granoff, 2005). Alginate oligosaccharides (AOS), prepared through enzymatic hydrolysis of alginate polymer, linear b-(1 ! 4)-linked glycuronan composed mainly of residues of b-D-mannosyluronic acid and its C-5 48 Mass Spectrometry Reviews DOI 10.1002/mas & TABLE 14. Use of MALDI–MS for examination of other natural products (Continued ) ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 49 HARVEY TABLE 14. (Continued ) & 50 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas & 51 HARVEY TABLE 14. (Continued ) & 52 Mass Spectrometry Reviews DOI 10.1002/mas TABLE 15. Use of MALDI to study the products of enzyme action on carbohydrates (Continued ) ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas & 53 HARVEY TABLE 15. (Continued ) (Continued ) & 54 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas & 55 HARVEY & epimer, and analyzed by MALDI-TOF–MS, have been shown to promote growth of Bifidobacteria, prebiotics that are thought to promote health (Wang et al., 2006d). Oligosaccharides from honey have been characterized by size-exclusion chromatography (SEC) and MALDI-TOF–MS after fractionation with water/ethanol solutions and activated charcoal (Morales et al., 2006). Di- and tri-saccharides were the main constituents but constituents with degrees of polymerization to 16 were observed by MALDI-TOF–MS. TABLE 15. (Continued ) XIV. CONCLUSIONS 56 Although method development has slowed in recent years, the work reported in this review has shown that applications of MALDI–MS to carbohydrate and glycoconjugate analysis are very much alive and growing. The technique has been applied to a very large range of compounds allowing problems to be solved in many diverse areas of science and commerce. Although electrospray ionization, with its convenient coupling to instruments that provide extensive fragmentation is now possibly more widely used, MALDI-TOF is superior in producing glycan profiles from mixtures because of its property of producing essentially only singly charged ions. Spectra produced by electrospray invariably contain multiply charged ions, various adducts and fragments that can confuse interpretation. On the down side, however, MALDI-TOF–MS, particularly in reflectron-TOF instruments is less attractive for sialylated glycans on account of the tendency for the sialic acid to be eliminated either within the ion source of during the ion’s flight through the instrument. Nevertheless, this problem can be readily overcome by suitable derivatization. The past two years have seen some developments in techniques, in particular the growth of negative ion formation from neutral glycans by use of anion adduction and specific matrices such as nor-harmane. Fragmentation of the resulting negative ions produces much more informative spectra than fragmentation in positive ion mode, mainly as the result of highly specific reaction pathways that produce mainly cross-ring cleavage products. Similar cross-ring product ions can also be produced using positive ions in TOF-TOF instruments that produce high-energy collisions and the use of these instruments also appears to be increasing. The review period has also seen some major advances in the development of software for carbohydrate analysis and the introduction of new databases containing both carbohydrates and their fragment ions. Although none of these systems is yet able to identify all compounds, they often provide pointers that considerably aid the manual process. Although the collection of the increasing number of articles in this area is becoming more time-consuming, the advent of powerful search engines such as Google scholar considerably aids the process by highlighting articles in some of the more obscure journals. Publications on the use of MALDI–MS for the analysis of carbohydrates continue to enter new areas and some exciting developments are expected in the coming years with the advent of new types of mass spectrometer such as those incorporating ion mobility separation. It is intended that Mass Spectrometry Reviews DOI 10.1002/mas & TABLE 16. Use of MALDI analysis to monitor N-glycosylation in biopharmaceuticals ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Mass Spectrometry Reviews DOI 10.1002/mas 57 HARVEY TABLE 16. (Continued ) & 58 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & TABLE 17. Use of MALDI–MS in the development of synthetic methods (Continued ) Mass Spectrometry Reviews DOI 10.1002/mas 59 & HARVEY TABLE 17. (Continued ) TABLE 18. Use of MALDI mass spectrometry for investigations of glycodendrimers 60 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & TABLE 18. (Continued ) (Continued ) Mass Spectrometry Reviews DOI 10.1002/mas 61 & HARVEY TABLE 18. (Continued ) 62 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & TABLE 19. Use of MALDI for the investigation of carbohydrate–protein conjugates TABLE 20. Use of MALDI–MS for the synthesis of carbohydrates from bacteria, fungi, etc. (Continued ) Mass Spectrometry Reviews DOI 10.1002/mas 63 & HARVEY TABLE 20. (Continued ) 64 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & TABLE 21. Use of MALDI–MS for the examination of products of carbohydrate synthesis (Continued ) Mass Spectrometry Reviews DOI 10.1002/mas 65 & HARVEY TABLE 21. (Continued ) 66 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & TABLE 21. (Continued ) (Continued ) Mass Spectrometry Reviews DOI 10.1002/mas 67 & HARVEY TABLE 21. (Continued ) 68 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES & TABLE 21. (Continued ) (Continued ) Mass Spectrometry Reviews DOI 10.1002/mas 69 & HARVEY TABLE 21. (Continued ) TABLE 22. Use of MALDI to study the products combinatorial experiments 70 Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES these updates follow this progress at least into the immediate future. XV. ABBREVIATIONS 2-AA 2-AB 2-AP 3-AQ Abe ABEE ACE AGE AGP Ala AMAC anhManol AOS AP-MALDI AQC Ara Ara4N Arg Asn Asp ATP ATT Bac BSA CALB Can caoWR Car CD CDG CE Cer CF CFTR CHCA CHO CID CMBT ConA CTH Cym Cys Da DC-SIGN DCTB 2-aminobenzoic acid 2-aminobenzamide 2-aminopyridine 3-aminoquinoline abequose (3,6-dideoxy-D-xylo-hexose) aminobenzoic acid ethyl ester angiotensin I converting enzyme advanced glycation end-products a1-acid glycoprotein alanine aminoacridone anhydromannitol alginate oligosaccharide atmospheric pressure MALDI 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate arabinose 4-amino-4-deoxy-L-arabinopyranose arginine asparagine aspartic acid adenosine triphosphate 6-azo-2-thiothymine bacillosamine (2,4-diamino-2,4,6trideoxy-D-glucose) bovine serum albumin Candida antarctica lipase B canarose Na-((aminooxy)acetyl)tryptophanylarginine methyl ester caryose cyclodextrin or circular dichroism congenital disorder of glycosylation capillary electrophoresis ceramide cystic fibrosis cystic fibrosis transmembrane conductance regulator a-cyano-4-hydroxycinnamic acid Chinese hamster ovary collision-induced dissociation (decomposition) 5-chloro-2-mercaptobenzothiazole concanavalin A ceramide trihexoside cymarose (2,6-dideoxy-3-O-methyl-ribohexose) cysteine Dalton dendritic cell-specific ICAM3-grabbing non-integrin 2-[4-tert-butylphenyl-2-methylprop-2enylidene]malonitrile Mass Spectrometry Reviews DOI 10.1002/mas & DHA dihydroxyacetophenone (2,5-dihydroxy isomer) DHAP dihydroxyacetophenone DHB dihydroxybenzoic acid (2,5-dihydroxy isomer unless stated otherwise) Dig digitoxose (2,6-dideoxy-D-ribo-hexose) DMB 1,2-diamino-4,5-methylenedioxybenzene DMF dimethylformamide DMSO dimethylsulfoxide DMT-MM 4-(4,6-dimethoxy-1,2,3-triazil-2-yl)-4methylmorpholinium chloride DNA deoxyribonucleic acid Dol dolichol DP degree of polymerization DS degree of substitution EDTA ethylenediaminetetraacetic acid EI electron impact ELIZA enzyme-linked immunoabsorbent assay Endo-F (D, H, M) endoglycosidase-F (D, H, M) EPO erythropoietin ER endoplasmic reticulum ESI electrospray ionization EtN ethanolamine f (as in Galf) furanose form of sugar ring FAB fast atom bombardment FAC frontal affinity chromatography FGF fibroblast growth factor Fmoc 9-fluorenylmethoxycarbonyl Fru fructose FT Fourier transform Fuc fucose (6-deoxygalactose) FucNAc N-acetylfucoseamine GAGS glycosaminoglycans Gal galactose GalA galacturonic acid GalN galactosamine GalNA 2-amino-2-deoxy-galacturonic acid GalNAc N-acetylgalactosamine GC/MS gas chromatography/mass spectrometry Glc glucose GlcA glucuronic acid GlcN glucosamine GlcNAc N-acetylglucosamine GlcUA glucuronic acid Glu glutamic acid Gly glycine GP glycoprotein GPI glycosyl-phosphatidylinositol Gro glycerol GSL glycosphingolipid HABA 2-(40 hydroxyphenyl)azobenzoic acid HE hydroxyethyl HEK human embryonic kidney HEMPAS hereditary erythroblastic multinuclearity with positive acidified serum lysis test Hep heptose Hex hexose HexA hexuronic acid HexNAc N-acetylhexosamine 71 & HARVEY HILIC HIQ HIV HPA HPAEC HPLC HRP HSA IAA ICAM ICR IdoA IEC IgG (or M) Ile INF Ino IR IRMPD ISD IT Kdn Kdo KEGG Ko LLac LC Leu LID LIF LNH LNnH LNnT LNT LOS LPS LSIMS LTA Lys Lyx m/z Mab (MAB) MALDI–MS MALS Man ManA ManNAc MS MUC Neu5Ac Neu5Gc Neu5Pr NKT NMR 72 hydrophilic interaction chromatography hydroxyisoquinoline human immunodeficiency virus hydroxypicolinic acid high-performance anion exchange chromatography high-performance liquid chromatography Horseradish peroxidase human serum albumin indoleacrylic acid intercellular adhesion molecule ion cyclotron resonance iduronic acid ion-exchange chromatography immunoglobulin G (or M) iso-leucine interferon inositol infrared infrared multiphoton dissociation in-source decay ion trap 3-deoxy-D-glycero-D-galacto-non-2ulopyranosonic acid 3-deoxy-D-manno-oct-2-ulosonic acid Kyoto Encyclopedia of Genes and Genomes D-glycero-D-talo-oct-2-ulosonic acid linear (as in linear-TOF) lactose b-D-galactopyranosyl-(1!4)-Dglucose liquid chromatography leucine laser-induced dissociation laser-induced fluorescence lacto-N-hexaose lacto-N-neo-hexaose lacto-N-neo-tetraose lacto-N-tetraose lipooligosaccharide lipopolysaccharides liquid secondary ion mass spectrometry lipoteichoic acid lysine lyxose mass to charge ratio monoclonal antibody matrix-assisted laser desorption/ionization mass spectrometry multi-angle light scattering detector mannose mannuronic acid N-acetylmannosamine mass spectrometry mucin N-acetylneuraminic (sialic) acid N-glycolylneuraminic acid N-propanoylneuraminic acid natural killer T cells nuclear magnetic resonance NSO Ole mouse myeloma cell line oleandrose (2,6-dideoxy-3-O-methyl-Larabino-hexose) OR optical rotation OSCAR oligosaccharide subtree constraint algorithm P (as in GlcP) phosphate p (as in Glcp) pyranose form of sugar ring PA-1 galactose-binding lectin from Pseudomonas aeruginosa PAD pulsed amperometric detection PAGE polyacrylamide gel electrophoresis PAMAM poly(amidoamine) PBS phosphate-buffered saline PC phosphorylcholine PE phosphoethanolamine PEG polyethylene glycol PIM phosphatidyl-myo-inositol mannosides PMP 1-phenyl-3-methyl-5-pyrazolone PNA p-nitroanaline PNGase protein-N-glycosidase Pro proline PSA prostate-specific antigen PSD post-source decay Pse pseudaminic acid (5,7-diamino-3,5,7,9tetradeoxy-L-glycero-L-manno-non-2ulosonic acid) PseNAc N-acetylpseudaminic acid Q quadrupole QIT quadrupole ion trap Qui quinovose (6-deoxyglucose) QuiNAc N-acetylquinovosamine Rreflectron (as in R-TOF) RAGE receptor for advanced glycation endproducts Rha rhamnose (6-deoxymannose) Rib ribose RNA ribonucleic acid RNase ribonuclease RP reversed phase rPA Bacillus anthracis protective antigen RSD relative standard deviation S/N signal-to-noise ratio SA sinapinic acid SAT sialic acid transporter sDHB super-DHB SDS sodium dodecyl sulfate SEC size-exclusion chromatography SELDI surface-enhanced laser desorption/ ionization Ser serine -T (as GlcNAc-T) transferase TEV tobacco etch virus TFA trifluoroacetic acid THAP trihydroxyacetophenone (normally the 2,4,6-trihydroxy isomer) The thevetose Thr threonine TLC thin-layer chromatography Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES TMS TOF TPA TT Tyv UDP UV WGA Xyl trimethylsilyl time-of-flight tissue plasminogen activator tetanus toxoid tyvelose (3,6-dideoxy-D-arabino-hexose) uridine diphosph(ate)(o) ultraviolet wheat germ agglutinin xylose REFERENCES Abe S, Moriyama H, Niikura K, Feng F, Monde K, Nishimura S-I. 2005. Versatile synthesis of oligosaccharide-containing fullerenes. Tetrahedron Asym 16:15–19. Abranches R, Marcel S, Arcalis E, Altmann F, Fevereiro P, Stoger E. 2005. Plants as bioreactors: A comparative study suggests that Medicago truncatula is a promising production system. J Biotechnol 120:121– 134. Adden R, Melander C, Brinkmalm G, Gorton L, Mischnick P. 2006a. New approaches to the analysis of enzymatically hydrolyzed methyl cellulose. Part 1. Investigation of the influence of structural parameters on the extent of degradation. Biomacromolecules 7:1399–1409. Adden R, Muller R, Brinkmalm G, Ehrler R, Mischnick P. 2006b. Comprehensive analysis of the substituent distribution in hydroxyethyl celluloses by quantitative MALDI-ToF-MS. Macromol Biosci 6:435– 444. Adden R, Niedner W, Müller R, Mischnick P. 2006c. Comprehensive analysis of the substituent distribution in the glucosyl units and along the polymer chain of hydroxyethylmethyl celluloses and statistical evaluation. Anal Chem 78:1146–1157. Adinolfi M, Galletti P, Giacomini D, Iadonisi A, Quintavalla A, Ravidà A. 2006. Toward novel glyconjugates: Efficient synthesis of glycosylated 4-alkylidene-b-lactams. Eur J Org Chem:69–73. Aime S, Gianolio E, Palmisano G, Robaldo B, Barge A, Boffa L, Cravotto G. 2006. Improved syntheses of bis(b-cyclodextrin) derivatives, new carriers for gadolinium complexes. Org Biomol Chem 4:1124–1130. Aitken A. 2005. Identification of posttranslational modification by mass spectrometry. In: Walker JM, editor. The Proteomics Protocols Handbook. Totowa, NJ: Humana Press. pp 431–438. Akaike E, Yamanoi T. 2006. The transglycosylation activity of the recombinant endo-b-N-acetylglucosaminidase from Mucor hiemalis in media containing organic solvents. Trends Glycosci Glycotechnol 18:63–71. Akama TO, Nakagawa H, Wong NK, Sutton-Smith M, Dell A, Morris HR, Nakayama J, Nishimura S-I, Pai A, Moremen KW, Marth JD, Fukuda MN. 2006. Essential and mutually compensatory roles of a-mannosidase II and a-mannosidase IIx in N-glycan processing in vivo in mice. Proc Natl Acad Sci USA 103:8983–8988. Akamatsu M, Fujimoto Y, Kataoka M, Suda Y, Kusumoto S, Fukase K. 2006. Synthesis of lipid A monosaccharide analogues containing acidic amino acid: Exploring the structural basis for the endotoxic and antagonistic activities. Bioorg Med Chem 14:6759–6777. Aldén A, Ohlson S, Påhlsson P, Rydén I. 2005. HPLC analysis of carbohydrate deficient transferrin isoforms isolated by the Axis-Shield %CDT method. Clin Chim Acta 356:143–146. Alderwick LJ, Radmacher E, Seidel M, Gande R, Hitchen PG, Morris HR, Dell A, Sahm H, Eggeling L, Besra GS. 2005. Deletion of Cg-emb in Corynebacterianeae leads to a novel truncated cell wall arabinogalactan, whereas inactivation of Cg-ubiA results in an arabinan-deficient mutant with a cell wall galactan core. J Biol Chem 280:32362–32371. Mass Spectrometry Reviews DOI 10.1002/mas & Allen S, Zaleski A, Johnston JW, Gibson BW, Apicella MA. 2005. Novel sialic acid transporter of Haemophilus influenzae. Infect Immun 73:5291–5300. Al-Mughaid H, Grindley TB. 2006. Synthesis of a nonavalent mannoside glycodendrimer based on pentaerythritol. J Org Chem 71:1390–1398. Alvarez-Mico X, Calvete MJF, Hanack M, Thomas Ziegler T. 2006. The first example of anomeric glycoconjugation to phthalocyanines. Tetrahedron Lett 47:3283–3286. Aly MRE, Rochaix P, Amessou M, Johannes L, Florent J-C. 2006. Synthesis of globo- and isoglobotriosides bearing a cinnamoylphenyl tag as novel electrophilic thiol-specific carbohydrate reagents. Carbohydr Res 341:2026–2036. Aly MRE, Schmidt RR. 2005. New diacylamino protecting groups for glucosamine. Eur J Org Chem:4382–4392. Amin MN, Ishiwata A, Ito Y. 2006. Synthesis of asparagine-linked bacillosamine. Carbohydr Res 341:1922–1929. Amon S, Plematl A, Rizzi A. 2006. Capillary zone electrophoresis of glycopeptides under controlled electroosmotic flow conditions coupled to electrospray and matrix-assisted laser desorption/ionization mass spectrometry. Electrophoresis 27:1209–1219. An HJ, Lurie S, Greve LC, Rosenquist D, Kirmiz C, Labavitch JM, Lebrilla CB. 2005a. Determination of pathogen-related enzyme action by mass spectrometry analysis of pectin breakdown products of plant cell walls. Anal Biochem 338:71–82. An HJ, Ninonuevo M, Aguilan J, Liu H, Lebrilla CB, Alvarenga LS, Mannis MJ. 2005b. Glycomics analyses of tear fluid for the diagnostic detection of ocular rosacea. J Proteome Res 4:1981–1987. An HJ, Miyamoto S, Lancaster KS, Kirmiz C, Li B, Lam KS, Leiserowitz GS, Lebrilla CB. 2006a. Profiling of glycans in serum for the discovery of potential biomarkers for ovarian cancer. J Proteome Res 5:1626– 1635. An HJ, Tillinghast JS, Woodruff DL, Rocke DM, Lebrilla CB. 2006b. A new computer program (GlycoX) to determine simultaneously the glycosylation sites and oligosaccharide heterogeneity of glycoproteins. J Proteome Res 5:2800–2808. Ando H, Shimizu H, Katano Y, Koike Y, Koizumi S, Ishida H, Kiso M. 2006. Studies on the a-(1-4)- and a-(1-8)-fucosylation of sialic acid for the total assembly of the glycan portions of complex HPG-series gangliosides. Carbohydr Res 341:1522–1532. André S, Kojima S, Gundel G, Russwurm R, Schratt X, Unverzagt C, Gabius H-J. 2006. Branching mode in complex-type triantennary N-glycans as regulatory element of their ligand properties. Biochim Biophys Acta 1760:768–782. Andrianasolo EH, Gross H, Goeger D, Musafija-Girt M, McPhail K, Leal RM, Mooberry SL, Gerwick WH. 2005. Isolation of swinholide A and related glycosylated derivatives from two field collections of marine cyanobacteria. Org Lett 7:1375–1378. Antonopoulos A, Hardouin J, Favetta P, Helbert W, Delmas AF, Lafosse M. 2005. Matrix-assisted laser desorption/ionisation mass spectrometry for the direct analysis of enzymatically digested kappa- iota- and hybrid iota/nu-carrageenans. Rapid Commun Mass Spectrom 19:2217– 2226. Anumula KR. 2006. Advances in fluorescence derivatization methods for high-performance liquid chromatographic analysis of glycoprotein carbohydrates. Anal Biochem 350:1–23. Aplander K, Tejler J, Toftered J, Carlsson S, Kahl-Knutsson B, Sundin A, Leffler H, Nilsson UJ. 2006. Synthesis of a 30 -naphthamido-LacNAc fluorescein conjugate with high selectivity and affinity for galectin-3. Carbohydr Res 341:1363–1369. Arai MA, Matsuo I, Hagihara S, Totani K, Maruyama J-I, Kitamoto K, Ito Y. 2005. Design and synthesis of oligosaccharides that interfere with glycoprotein quality-control systems. ChemBioChem 6:2281–2289. Arnold JN, Wallis RR, Willis AC, Harvey DJ, Royle L, Dwek RA, Rudd PM, Sim RB. 2006. Interaction of mannan binding lectin with a-2 73 & HARVEY macroglobulin via exposed oligomannose glycans: A conserved feature of the thiol-ester protein family? J Biol Chem 281:6955–6963. Arnold JN, Wormald MR, Suter DM, Radcliffe CM, Harvey DJ, Dwek RA, Rudd PM, Sim RB. 2005. Human serum IgM glycosylation: Identification of glycoforms that can bind to mannan-binding lectin. J Biol Chem 280:29080–29087. Asakawa H, Sasabe M, Miyazaki R, Matsuda H, Fukai F, Hanada K, Hirano H, Takasaki S. 2006. The analysis of N-glycolylneuraminic acid (NeuGc) of hepatoma tissue and K562 cell ferritins using HPLC and mass spectrometry. Proc Jpn Acad Ser B 82:181–187. Ashline D, Singh S, Hanneman A, Reinhold V. 2005. Congruent strategies for carbohydrate sequencing. 1. Mining structural details by MSn. Anal Chem 77:6250–6262. Aumüller I, Lindhorst TK. 2006. Chromophore-supported purification in parallel synthesis. Eur J Org Chem:1103–1108. Avril T, North SJ, Haslam SM, Willison HJ, Crocker PR. 2006. Probing the cis interactions of the inhibitory receptor Siglec-7 with 2,8-disialylated ligands on natural killer cells and other leukocytes using glycan-specific antibodies and by analysis of 2,8-sialyltransferase gene expression. J Leukocyte Biol 80:787–796. Badi N, Jarroux N, Guégan P. 2006. Synthesis of per-2,3-di-O-heptyl-b and gcyclodextrins: A new kind of amphiphilic molecules bearing hydrophobic parts. Tetrahedron Lett 47:8925–8927. Baigude H, Katsuraya K, Tokunaga S, Fujiwara N, Satoyama M, Magome T, Okuyama K, Borjihan G, Uryu T. 2005. Synthesis of an oligosaccharide-polylysine dendrimer with reducing sugar terminals leading to acquired immunodeficiency syndrome vaccine preparation. J Polym Sci A 43:2195–2206. Bailey MJ, Hooker AD, Adams CS, Zhang S, James DC. 2005. A platform for high-throughput molecular characterization of recombinant monoclonal antibodies. J Chromatogr B 826:177–187. Bakker H, Rouwendal GJA, Karnoup AS, Florack DEA, Stoopen GM, Helsper JPFG, Van Ree R, Van Die I, Bosch D. 2006. An antibody produced in tobacco expressing a hybrid b-1,4-galactosyltransferase is essentially devoid of plant carbohydrate epitopes. Proc Natl Acad Sci USA 103:7577–7582. Baldwin MA. 2005. Analysis of glycosylphosphatidylinositol protein anchors: The prion protein. Methods Enzymol 405:172–187. Balen B, Krsnik-Rasol M, Zamfir AD, Miloševic J, Vakhrushev SY, PeterKatalinic J. 2006. Glycoproteomic survey of Mammillaria gracillis tissues grown in vitro. J Proteome Res 5:1658–1666. Bao X, Muramatsu T, Sugahara K. 2005. Demonstration of the pleiotrophinbinding oligosaccharide sequences isolated from chondroitin sulfate/ dermatan sulfate hybrid chains of embryonic pig brains. J Biol Chem 280:35318–35328. Bao X, Nishimura S, Mikami T, Yamada S, Itoh N, Sugahara K. 2004. Chondroitin sulfate/dermatan sulfate hybrid chains from embryonic pig brain, which contain a higher proportion of L-iduronic acid than those from adult pig brain, exhibit neuritogenic and growth factor binding activities. J Biol Chem 279:9765–9776. Bao X, Pavão MSG, Cabral dos Santos J, Sugahara K. 2005. A functional dermatan sulfate epitope containing iduronate(2-O-sulfate)a1-3GalNAc(6-O-sulfate) disaccharide in the mouse brain. Demonstration using a novel monoclonal antibody raised against dermatan sulfate of ascidian Ascidia nigra. J Biol Chem 280:23184–23193. Barboza M, Duschak VG, Fukuyama Y, Nonami H, Erra-Balsells R, Cazzulo JJ, Couto AS. 2005. Structural analysis of the N-glycans of the major cysteine proteinase of Trypanosoma cruzi. FEBS J 272:3803– 3815. Bardor M, Cabrera G, Rudd PM, Dwek RA, Cremata JA, Lerouge P. 2006. Analytical strategies to investigate plant N-glycan profiles in the context of plant-made pharmaceuticals. Curr Opin Struct Biol 16:576–583. Barton CJ, Tailford LE, Welchman H, Zhang Z, Gilbert HJ, Dupree P, Goubet F. 2006. Enzymatic fingerprinting of Arabidopsis pectic polysacchar- 74 ides using polysaccharide analysis by carbohydrate gel electrophoresis. Planta 224:163–174. Bastida A, Hidalgo A, Chiara JL, Torrado M, Corzana F, Pérez-Cañadillas JM, Groves P, Garcia-Junceda E, Gonzalez C, Jimenez-Barbero J, Asensio JL. 2006. Exploring the use of conformationally locked aminoglycosides as a new strategy to overcome bacterial resistance. J Am Chem Soc 128:100–116. Bauer J, Brandenburg K, Zähringer U, Rademann J. 2006. Chemical synthesis of a glycolipid library by a solid-phase strategy allows elucidation of the structural specificity of immunostimulation by rhamnolipids. Chem Eur J 12:7116–7124. Bauer S, Vasu P, Mort AJ, Somerville CR. 2005. Cloning, expression, and characterization of an oligoxyloglucan reducing end-specific xyloglucanobiohydrolase from Aspergillus nidulans. Carbohydr Res 340: 2590–2597. Baytekin B, Werner N, Luppertz F, Engeser M, Bruggemann J, Bitter S, Henkel R, Felder T, Schalley CA. 2006. How useful is mass spectrometry for the characterization of dendrimers? Int J Mass Spectrom 249–250:138–148. Bazin HG, Bess LS, Livesay MT, Ryter KT, Johnson CL, Arnold JS, Johnson DA. 2006. New synthesis of glycolipid immunostimulants RC-529 and CRX-524. Tetrahedron Lett 47:2087–2092. Beck A, Bussat M-C, Zorn N, Robillard V, Klinguer-Hamour C, Chenu S, Goetsch L, Corvaı̈a N, Van Dorsselaer A, Haeuw J-F. 2005. Characterization by liquid chromatography combined with mass spectrometry of monoclonal anti-IGF-1 receptor antibodies produced in CHO and NS0 cells. J Chromatogr B 819:203–218. Bedini E, Carabellese A, Comegna D, De Castro C, Parrilli M. 2006. Synthetic oligorhamnans related to the most common O-chain backbone from phytopathogenic bacteria. Tetrahedron 62:8474– 8483. Bekesová S, Kovácik V, Chmelik J, Kovác P. 2006. Negative electrospray, ion trap multistage mass spectrometry of synthetic fragments of the O-PS of Vibrio cholerae O:1. Eur J Mass Spectrom 12:43–50. Belgacem O, Bowdler A, Brookhouse I, Brancia FL, Raptakis E. 2006. Dissociation of biomolecules using a ultraviolet matrix-assisted laser desorption/ionisation time-of-flight/curved field reflectron tandem mass spectrometer equipped with a differential-pumped collision cell. Rapid Commun Mass Spectrom 20:1653–1660. Bélot F, Guerreiro C, Baleux F, Mulard LA. 2005. Synthesis of two linear PADRE conjugates bearing a deca- or pentadecasaccharide B epitope as potential synthetic vaccines against Shigella flexneri serotype 2a infection. Chem Eur J 11:1625–1635. Bencúr P, Steinkellner H, Svoboda B, Mucha J, Strasser R, Kolarich D, Hann S, Köllensperger G, Glössl J, Altmann F, Mach L. 2005. Arabidopsis thaliana b1,2-xylosyltransferase: An unusual glycosyltransferase with the potential to act at multiple stages of the plant N-glycosylation pathway. Biochem J 388:515–525. Bera A, Herbert S, Jakob A, Vollmer W, Götz F. 2005. Why are pathogenic staphylococci so lysozyme resistant? The peptidoglycan O-acetyltransferase OatA is the major determinant for lysozyme resistance of Staphylococcus aureus. Mol Microbiol 55:778–787. Berenson CS, Sayles KB, Huang J, Reinhold VN, Garlipp MA, Yohe HC. 2005. Nontypeable Haemophilus influenzae-binding gangliosides of human respiratory (HEp-2) cells have a requisite lacto/neolacto core structure. FEMS Immunol Med Microbiol 45:171–182. Beyer M, Koch H, Fischer K. 2006. Role of hemicelluloses in the formation of chromophores during heat treatment of bleached chemical pulps. Macromol Symp 232:98–106. Bianchi A, Ferrario D, Bernardi A. 2006. A facile stereoselective synthesis of a-glycosyl ureas. Carbohydr Res 341:1438–1446. Bianchi A, Russo A, Bernardi A. 2005. Neo-glycoconjugates: Stereoselective synthesis of a-glycosyl amides via Staudinger ligation reactions. Tetrahedron Asym 16:381–386. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Bidasee KR, Zhang Y, Shao CH, Wang M, Patel KP, Dincer ÜD, Besch HRJ. 2004. Diabetes increases formation of advanced glycation end products on sarco(endo)plasmic reticulum Ca2þ-ATPase. Diabetes 53:463– 473. Bindschädler P, Noti C, Castagnetti E, Seeberger PH. 2006. Synthesis of a potential 10E4 tetrasaccharide antigen involved in scrapie pathogenesis. Helv Chim Acta 89:2591–2610. Biroccio A, Urbani A, Massoud R, di Ilio C, Sacchetta P, Bernardini S, Cortese C, Federici G. 2005. A quantitative method for the analysis of glycated and glutathionylated hemoglobin by matrix-assisted laser desorption ionization-time of flight mass spectrometry. Anal Biochem 336:279–288. Bisht KS, Bhatt S, Muppalla K. 2006. Synthesis of glycolipid analogs via highly regioselective macrolactonization catalyzed by lipase. Tetrahedron Lett 47:8645–8649. Biskup MB, Müller JU, Weingart R, Schmidt RR. 2005. New methods for the generation of carbohydrate arrays on glass slides and their evaluation. ChemBioChem 6:1007–1015. Black C, Poile C, Langley J, Herniman J. 2006. The use of pencil lead as a matrix and calibrant for matrix-assisted laser desorption/ionisation. Rapid Commun Mass Spectrom 20:1053–1060. Blattner R, Furneaux RH, Ludewig M. 2006. Syntheses of oligomannosides in solution and on a soluble polymer support: A comparison. Carbohydr Res 341:299–321. Blixt O, Vasiliu D, Allin K, Jacobsen N, Warnock D, Razi N, Paulson JC, Bernatchez S, Gilbert M, Wakarchu W. 2005. Chemoenzymatic synthesis of 2-azidoethyl-ganglio-oligosaccharides GD3, GT3, GM2, GD2, GT2, GM1, and GD1a. Carbohydr Res 340:1963–1972. Blundell CD, Almond A. 2006. Enzymatic and chemical methods for the generation of pure hyaluronan oligosaccharides with both odd and even numbers of monosaccharide units. Anal Biochem 353:236–247. Bodine KD, Gin DY, Gin MS. 2005. Highly convergent synthesis of C3- or C2-symmetric carbohydrate macrocycles. Org Lett 7:4479–4482. Bohn ML, Colombo MI, Stortz CA, Rúveda EA. 2006. A comparative study of the influence of some protecting groups on the reactivity of Dglucosamine acceptors with a galactofuranosyl donor. Carbohydr Res 341:1096–1104. Bollati-Fogolı́n M, Forno G, Nimtz M, Conradt H, Etcheverrigaray M, Kratje R. 2005. Temperature reduction in cultures of hGM-CSF-expressing CHO cells: Effect on productivity and product quality. Biotechnol Prog 21:17–21. Bondili JS, Castilho A, Mach L, Glössl J, Steinkellner H, Altmann F, Strasser R. 2006. Molecular cloning and heterologous expression of b1,2xylosyltransferase and core a1,3-fucosyltransferase from maize. Phytochemistry 67:2215–2224. Bortolotti F, De Paoli G, Tagliaro F. 2006. Carbohydrate-deficient transferrin (CDT) as a marker of alcohol abuse: A critical review of the literature 2001–2005. J Chromatogr B 841:96–109. Bösch A, Nimtz M, Mischnick P. 2006. Mechanistic studies on cationic ringopening polymerisation of cyclodextrin derivatives using various Lewis acids. Cellulose 13:493–507. Bouillon C, Meyer A, Vidal S, Jochum A, Chevolot Y, Cloarec J-P, Praly J-P, Vasseur J-J, Morvan F. 2006. Microwave assisted ‘‘click’’ chemistry for the synthesis of multiple labeled-carbohydrate oligonucleotides on solid support. J Org Chem 71:4700–4702. Brancia FL, Bereszczak JZ, Lapolla A, Fedele D, Baccarin L, Seraglia R, Traldi P. 2006. Comprehensive analysis of glycated human serum albumin tryptic peptides by off-line liquid chromatography followed by MALDI analysis on a time-of-flight/curved field reflectron tandem mass spectrometer. J Mass Spectrom 41:1179–1185. Brecker L, Wicklein D, Moll H, Fuchs EC, Becker W-M, Petersen A. 2005. Structural and immunological properties of arabinogalactan polysaccharides from pollen of timothy grass (Phleum pratense L.). Carbohydr Res 340:657–663. Mass Spectrometry Reviews DOI 10.1002/mas & Brik A, Ficht S, Yang Y-Y, Bennett CS, Wong C-H. 2006a. Sugar-assisted ligation of N-linked glycopeptides with broad sequence tolerance at the ligation junction. J Am Chem Soc 128:15026–15033. Brik A, Yang Y-Y, Ficht S, Wong C-H. 2006b. Sugar-assisted glycopeptide ligation. J Am Chem Soc 128:5626–5627. Bruce AF, Gounaris K. 2006. Characterisation of a secreted N-acetyl-bhexosaminidase from Trichinella spiralis. Mol Biochem Parasitol 145:84–93. Brunner A, Kolarich D, Voglmeir J, Paschinger K, Wilson IBH. 2006. Comparative characterisation of recombinant invertebrate and vertebrate peptide O-xylosyltransferases. Glycoconj J 23:543–554. Buchowiecka A, Bielecki S. 2003. Determination of the regiochemistry of Dglucal glucosylation by endo-b-1,3-glucanase GA Cellulomonas cellulans using CI MS. Biocatal Biotransform 21:1–5. Budnik BA, Lee RS, Steen JAJ. 2006. Global methods for protein glycosylation analysis by mass spectrometry. Biochim Biophys Acta 1764:1870–1880. Burguiere A, Hitchen PG, Dover LG, Kremer L, Ridell M, Alexander DC, Liu J, Morris HR, Minnikin DE, Dell A, Besra GS. 2005. LosA, a key glycosyltransferase involved in the biosynthesis of a novel family of glycosylated acyltrehalose lipooligosaccharides from Mycobacterium marinum. J Biol Chem 280:42124–42133. Buskas T, Ingale S, Boons G-J. 2006. Glycopeptides as versatile tools for glycobiology. Glycobiology 16:113R–136R. Buskas T, Li Y, Boons G-J. 2005. Synthesis of a dimeric Lewis antigen and the evaluation of the epitope specificity of antibodies elicited in mice. Chem Eur J 11:5457–5467. Busse K, Averbeck M, Anderegg U, Arnold K, Simon JC, Schiller J. 2006. The signal-to-noise ratio as a measure of HA oligomer concentration: A MALDI-TOF MS study. Carbohydr Res 341:1065–1070. Bykova NV, Rampitsch C, Krokhin O, Standing K, Ens W. 2006. Determination and characterization of site-specific N-glycosylation using MALDI-Qq-TOF tandem mass spectrometry: Case study with a plant protease. Anal Chem 78:1093–1103. Cabrera JC, Messiaen J, Cambier P, Van Cutsem P. 2006. Size, acetylation and concentration of chitooligosaccharide elicitors determine the switch from defence involving PAL activation to cell death and water peroxide production in Arabidopsis cell suspensions. Physiol Plant 127:44–56. Cabrera JC, Van Cutsem P. 2005. Preparation of chitooligosaccharides with degree of polymerization higher than 6 by acid or enzymatic degradation of chitosan. Biochem Eng J 25:165–172. Cai C, Zhou K, Wu Y, Wu L. 2006. Enhanced liver targeting of 5-fluorouracil using galactosylated human serum albumin as a carrier molecule. J Drug Target 14:55–61. Cai Y-Z, Xing J, Sun M, Zhan Z-Q, Corke H. 2005. Phenolic antioxidants (hydrolyzable tannins, flavonols, and anthocyanins) identified by LCESI-MS and MALDI-QIT-TOF MS from Rosa chinensis flowers. J Agric Food Chem 53:9940–9948. Campa C, Coslovi A, Flamigni A, Rossi M. 2006. Overview on advances in capillary electrophoresis-mass spectrometry of carbohydrates: A tabulated review. Electrophoresis 27:2027–2050. Carpenter C, Nepogodiev SA. 2005. Synthesis of a aMan(1-3)aMan(12)aMan glycocluster presented on a b-cyclodextrin scaffold. Eur J Org Chem:3286–3296. Carpentier M, Morelle W, Coddeville B, Pons A, Masson M, Mazurier J, Legrand D. 2005. Nucleolin undergoes partial N- and O-glycosylations in the extranuclear cell compartment. Biochemistry 44:5804–5815. Casabuono AC, D’Antuono A, Sato Y, Nonami H, Ugalde R, Lepek V, ErraBalsells R, Couto AS. 2006. A matrix-assisted laser desorption/ ionization mass spectrometry approach to the lipid A from Mesorhizobium loti. Rapid Commun Mass Spectrom 20:2175–2182. Cato D, Buskas T, Boons G-J. 2005. Highly efficient stereospecific preparation of Tn and TF building blocks using thioglycosyl donors and the Ph2SO/Tf2O. J Carbohydr Chem 24:503–516. 75 & HARVEY Cauet G, Strub J-M, Leize E, Wagner E, Van Dorsselaer A, Lusky M. 2005. Identification of the glycosylation site of the adenovirus type 5 fiber protein. Biochemistry 44:5453–5460. Cavalier DM, Keegstra K. 2006. Two xyloglucan xylosyltransferases catalyze the addition of multiple xylosyl residues to cellohexaose. J Biol Chem 281:34197–34207. Chait BT, Wang R, Beavis RC, Kent SBH. 1993. Protein ladder sequencing. Science 262:89–92. Chaiyaso T, H-kittikun A, Zimmermann W. 2006. Biocatalytic acylation of carbohydrates with fatty acids from palm fatty acid distillates. J Ind Microbiol Biotechnol 33:338–342. Chan T-WD, Chan PK, Tang KY. 2006. Determination of molecular weight profile for a bioactive b-(1-3) polysaccharides (Curdlan). Anal Chim Acta 556:226–236. Chang R, Vo T-T, Finney NS. 2006. Synthesis of the C1-phosphonate analog of UDP-GlcNAc. Carbohydr Res 341:1998–2004. Chen G, Bai Q, Geng X. 2006. Preparation of a concanavalin A immobilized affinity column and its application in the structural analysis of ribonuclease B. Chin J Chromatogr 24:425–432. Chen H, Yan X, Zhu P, Lin J. 2006a. Antioxidant activity and hepatoprotective potential of agaro-oligosaccharides in vitro and in vivo. Nutr J 5:31. Chen L, Zhao X-E, Lai D, Song Z, Kong F. 2006b. A concise and practical synthesis of antigenic globotriose, a-D-Gal-(1-4)-b-D-Gal-(1-4)-b-DGlc. Carbohydr Res 341:1174–1180. Chen W, Lee PJ, Stapels M. 2006. The use of mass spectrometry to determine location and extent of N-glycosylation on folate binding protein from bovine milk. Rapid Commun Mass Spectrom 20:313–316. Chen X, Hu L, Su X, Kong L, Ye M, Zou H. 2006c. Separation and detection of compounds in Honeysuckle by integration of ion-exchange chromatography fractionation with reversed-phase liquid chromatographyatmospheric pressure chemical ionization mass spectrometer and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry analysis. J Pharm Biomed Anal 40:559–570. Chen Y-J, Chen S-H, Chien Y-Y, Chang Y-W, Liao H-K, Chang C-Y, Jan M-D, Wang K-T, Lin C-C. 2005a. Carbohydrate-encapsulated gold nanoparticles for rapid target-protein identification and binding-epitope mapping. ChemBioChem 6:1169–1173. Chen Y-L, Leguijt R, Redlich H. 2006. Propane-1,3-diyl dithioacetals of carbohydrates; Part 7: Preparation of aminocyclitols and iminosugars by intramolecular cyclizations of D-glucosamine propane-1,3-diyl dithioacetal derivatives. Synthesis:2242–2250. Chen Z, Huang J, Suurs P, Schols HA, Voragen AGJ. 2005b. Granule size affects the acetyl substitution on amylopectin populations in potato and sweet potato starches. Carbohydr Polym 62:333–337. Cheshev P, Marra A, Dondoni A. 2006. Direct epoxidation of D-glucal and Dgalactal derivatives with in situ generated DMDO. Carbohydr Res 341:2714–2716. Chevalier R, Colsch B, Afonso C, Baumann N, Tabet J-C, Mallet J-M. 2006. Synthetic sulfated glucuronosyl paragloboside (SGPG) and its use for the detection of autoimmune peripheral neuropathies. Tetrahedron 62:563–577. Chinthaka SDM, Chu Y, Rannulu NS, Rodgers MT. 2006. Sodium cation affinities of MALDI matrices determined by guided ion beam tandem mass spectrometry: Application to benzoic acid derivatives. J Phys Chem A 110:1426–1437. Choi S-S, Ha S-H. 2006. Characterization of ionized maltooligosaccharides by sodium cation in MALDI-TOFMS depending on the molecular size. Bull Korean Chem Soc 27:1243–1245. Choi SS, Park TH. 2006. Enhancement of sialyltransferase-catalyzed transfer of sialic acid onto glycoprotein oligosaccharides using silkworm hemolymph and its 30K protein. J Mol Catal B Enzym 43:128–132. Choisnard L, Gèze A, Putaux J-L, Wong Y-S, Wouessidjew D. 2006. Nanoparticles of b-cyclodextrin esters obtained by self-assembling of biotransesterified b-cyclodextrins. Biomacromolecules 7:515–520. 76 Choudhury B, Carlson RW, Goldberg JB. 2005. The structure of the lipopolysaccharide from a galU mutant of Pseudomonas aeruginosa serogroup-O11. Carbohydr Res 340:2761–2772. Choudhury B, Leoff C, Saile E, Wilkins P, Quinn CP, Kannenberg EL, Carlson RW. 2006. The structure of the major cell wall polysaccharide of Bacillus anthracis is species-specific. J Biol Chem 281:27932– 27941. Chow LP, Chiu LL, Khoo KH, Peng HJ, Yang SY, Huang SW, Su SN. 2005. Purification and structural analysis of the novel glycoprotein allergen Cyn d 24, a pathogenesis-related protein PR-1, from Bermuda grass pollen. FEBS J 272:6218–6227. Christensen B, Nielsen MS, Haselmann KF, Petersen TE, Sorensen ES. 2005. Post-translationally modified residues of native human osteopontin are located in clusters: Identification of 36 phosphorylation and five Oglycosylation sites and their biological implications. Biochem J 390:285–292. Chung S-W, Joo H-S, Jang K-S, Lee H-J, Lee S-G, Kim B-G. 2006. Galactosylation and sialylation of terminal glycan residues of human immunoglobulin G using bacterial glycosyltransferases with in situ regeneration of sugar-nucleotides. Enzyme Microb Technol 39:60–66. Cid MB, Alfonso F, Martı́n-Lomas M. 2005. A study on the influence of the structure of the glycosyl acceptors on the stereochemistry of the glycosylation reactions with 2-azido-2-deoxy-hexopyranosyl trichloroacetimidates. Chem Eur J 11:928–938. Cindric M, Bindila L, Cepo T, Peter-Katalinic J. 2006. Mass spectrometrybased glycoproteomic approach involving lysine derivatization for structural characterization of recombinant human erythropoietin. J Proteome Res 5:3066–3076. Cipollo JF, Awad AM, Costello CE, Hirschberg CB. 2005. N-glycans of Caenorhabditis elegans are specific to developmental stages. J Biol Chem 280:26063–26072. Ciucanu I. 2006. Per-O-methylation reaction for structural analysis of carbohydrates by mass spectrometry. Anal Chim Acta 576:147–155. Claridge TDW, Long DD, Baker CM, Odell B, Grant GH, Edwards AA, Tranter GE, Fleet GWJ, Smith MD. 2005. Helix-forming carbohydrate amino acids. J Org Chem 70:2082–2090. Comelli EM, Head SR, Gilmartin T, Whisenant T, Haslam SM, North SJ, Wong N-K, Kudo T, Narimatsu H, Esko JD, Drickamer K, Dell A, Paulson JC. 2006a. A focused microarray approach to functional glycomics: Transcriptional regulation of the glycome. Glycobiology 16:117–131. Comelli EM, Sutton-Smith M, Yan Q, Amado M, Panico M, Gilmartin T, Whisenant T, Lanigan CM, Head SR, Goldberg D, Morris HR, Dell A, Paulson JC. 2006b. Activation of murine CD4þ and CD8þ T lymphocytes leads to dramatic remodeling of N-linked glycans. J Immunol 177:2431–2440. Córdova A, IIbrahem I, Casas J, Sundén H, Engqvist M, Reyes E. 2005. Amino acid catalyzed neogenesis of carbohydrates: A plausible ancient transformation. Chem Eur J 11:4772–4784. Corsaro MM, Gambacorta A, Iadonisi A, Lanzetta R, Naldi T, Nicolaus B, Romano I, Ummarino S, Parrilli M. 2006. Structural determination of the O-Chain polysaccharide from the lipopolysaccharide of the haloalkaliphilic Halomonas pantelleriensis bacterium. Eur J Org Chem:1801–1808. Côté GL, Sheng S. 2006. Penta-, hexa-, and heptasaccharide acceptor products of alternansucrase. Carbohydr Res 341:2066–2072. Cottiglia F, Bonsignore L, Casu L, Deidda D, Pompei R, Casu M, Floris C. 2005. Phenolic constituents from Ephedra nebrodensis. Nat Prod Res 19:117–123. Cox KM, Sterling JD, Regan JT, Gasdaska JR, Frantz KK, Peele CG, Black A, Passmore D, Moldovan-Loomis C, Srinivasan M, Cuison S, Cardarelli PM, Dickey LF. 2006. Glycan optimization of a human monoclonal antibody in the aquatic plant Lemna minor. Nat Biotechnol 24:1591– 1597. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Cozzolino R, Malvagna P, Spina E, Giori A, Fuzzati N, Anelli A, Garozzo D, Impallomeni G. 2006. Structural analysis of the polysaccharides from Echinacea angustifolia radix. Carbohydr Polym 65:263– 272. Creaser CS, Ratcliffe L. 2006. Atmospheric pressure matrix-assisted laser desorption/ionisation mass spectrometry: A review. Curr Anal Chem 2:9–15. Crispin M, Harvey DJ, Chang VT, Yu C, Aricescu AR, Jones EY, Davis SJ, Dwek RA, Rudd PM. 2006. Inhibition of hybrid- and complex-type glycosylation reveals the presence of the GlcNAc transferase Iindependent fucosylation pathway. Glycobiology 16:748–756. Crombez L, Marques B, Lenormand JL, Mouz N, Polack B, Trocme C, Toussaint B. 2005. High level production of secreted proteins: Example of the human tissue inhibitor of metalloproteinases 1. Biochem Biophys Res Commun 337:908–915. Cui SW. 2005. Structural analysis of polysaccharides. In: Cui SW, editor. Food carbohydrates: Chemistry, physical properties and applications. Baca Raton, FL: Taylor and Francis. pp 105–160. Cumpstey I. 2006. New oligosaccharide analogues: Non-glycosidically linked thioether-bridged pseudodisaccharides. Synlett:1711–1714. da Silva BP, Campos PO, Parente JP. 2006. Chemical structure and biological activity of steroidal saponins from Furcraea gigantea. Chem Nat Compd 42:316–321. Damager I, Jensen MT, Olsen CE, Blennow A, Møller BL, Svensson B, Motawia MS. 2005. Chemical synthesis of a dual branched maltodecaose: A potential substrate for a-amylases. ChemBioChem 6:1224– 1233. De Castro C, Carannante A, Lanzetta R, Liparoti V, Molinaro A, Parrilli M. 2006. Core oligosaccharide structure from the highly phytopathogenic Agrobacterium tumefaciens TT111 and conformational analysis of the putative rhamnan epitope. Glycobiology 16:1272–1280. De Castro C, Molinaro A, Lanzetta R, Holst O, Parrilli M. 2005. The linkage between O-specific caryan and core region in the lipopolysaccharide of Burkholderia caryophylli is furnished by a primer monosaccharide. Carbohydr Res 340:1802–1807. de Jesús Pérez J, Juárez S, Chen D, Scott CL, Hartweck LM, Olszewski NE, Garcı́a JA. 2006. Mapping of two O-GlcNAc modification sites in the capsid protein of the potyvirus Plum pox virus. FEBS Lett 580:5822– 5828. de la Salle H, Mariotti S, Angenieux C, Gilleron M, Garcia-Alles L-F, Malm D, Berg T, Paoletti S, Maı̂tre B, Mourey L, Salamero J, Cazenave JP, Hanau D, Mori L, Puzo G, De Libero G. 2005. Assistance of microbial glycolipid antigen processing by CD1e. Science 310:1321– 1324. De Lorenzo C, Cozzolino R, Carpentieri A, Pucci P, Laccetti P, D’Alessio G. 2005. Biological properties of a human compact anti-ErbB2 antibody. Carcinogenesis 26:1890–1895. de Paz JL, Noti C, Seeberger PH. 2006. Microarrays of synthetic heparin oligosaccharides. J Am Chem Soc 128:2766–2767. de Paz J-L, Ojeda R, Barrientos ÁG, Penadés S, Martı́n-Lomas M. 2005. Synthesis of a Ley neoglycoconjugate and Ley-functionalized gold glyconanoparticles. Tetrahedron Asym 16:149–158. de Rijke E, Out P, Niessen WMA, Ariese F, Gooijer C, Brinkman UAT. 2006. Analytical separation and detection methods for flavonoids. J Chromatogr A 1112:31–63. de Segura AG, Alcalde M, Bernabé M, Ballesteros A, Plou FJ. 2006. Synthesis of methyl a-D-glucooligosaccharides by entrapped dextransucrase from Leuconostoc mesenteroides B-1299. J Biotechnol 124: 439–445. DeFrees S, Wang Z-G, Xing R, Scott AE, Wang J, Zopf D, Gouty DL, Sjoberg ER, Panneerselvam K, Brinkman-Van der Linden ECM, Bayer RJ, Tarp MA, Clausen H. 2006. GlycoPEGylation of recombinant therapeutic proteins produced in Escherichia coli. Glycobiology 16:833–843. Mass Spectrometry Reviews DOI 10.1002/mas & del Castillo Busto ME, Montes-Bayón M, Blanco-González E, Meija J, SanzMedel A. 2005. Strategies to study human serum transferrin isoforms using integrated liquid chromatography ICPMS, MALDI-TOF, and ESI-Q-TOF detection: Application to chronic alcohol abuse. Anal Chem 77:5615–5621. Dellagreca M, Previtera L, Zarrelli A. 2005. A new xyloside from Chenopodium album. Nat Prod Res 19:87–90. Demelbauer UM, Plematl A, Josic D, Allmaier G, Rizzi A. 2005. On the variation of glycosylation in human plasma derived antithrombin. J Chromatogr A 1080:15–21. Deng C, O’Neill MA, York WS. 2006. Selective chemical depolymerization of rhamnogalacturonans. Carbohydr Res 341:474–484. Deng S, Gangadharmath U, Chang C-WT. 2006. Sonochemistry: A powerful way of enhancing the efficiency of carbohydrate synthesis. J Org Chem 71:5179–5185. Dengjel J, Rammensee H-G, Stevanovic S. 2005. Glycan side chains on naturally presented MHC class II ligands. J Mass Spectrom 40:100– 104. Deshayes C, Laval F, Montrozier H, Daffé M, Etienne G, Reyrat J-M. 2005. A glycosyltransferase involved in biosynthesis of triglycosylated glycopeptidolipids in Mycobacterium smegmatis: Impact on surface properties. J Bacteriol 187:7283–7291. Devakumar A, Thompson MS, Reilly JP. 2005. Fragmentation of oligosaccharide ions with 157 nm vacuum ultraviolet light. Rapid Commun Mass Spectrom 19:2313–2320. Di Fabio G, Randazzo A, D’Onofrio J, Ausı́n C, Pedroso E, Grandas A, De Napoli L, Montesarchio D. 2006. Cyclic phosphate-linked oligosaccharides: Synthesis and conformational behavior of novel cyclic oligosaccharide analogues. J Org Chem 71:3395–3408. Di Patrizi L, Rosati F, Guerranti R, Pagani R, Gerwig GJ, Kamerling JP. 2006. Structural characterization of the N-glycans of gpMuc from Mucuna pruriens seeds. Glycoconj J 23:599–609. Di Stasio B, Frochot C, Dumas E, Even P, Zwier J, Müller A, Didelon J, Guillemin F, Viriot M-L, Barberi-Heyob M. 2005. The 2aminoglucosamide motif improves cellular uptake and photodynamic activity of tetraphenylporphyrin. Eur J Med Chem 40:1111–1122. Dicko MH, Hilhorst R, Traore AS. 2005. Indigenous West African plants as novel sources of polysaccharide degrading enzymes: Application in the reduction of the viscosity of cereal porridges. Afr J Biotechnol 4:1095– 1104. Didraga M, Barroso B, Bischoff R. 2006. Recent developments in proteoglycan purification and analysis. Curr Pharm Anal 2:323–337. Didraga M, Barroso B, de Vries M, Kerstjens H, Postma D, Bischoff R. 2006. Purification of decorin core protein from human lung tissue. J Chromatogr A 1123:151–159. Dignam CF, Randall LA, Blacken RD, Cunningham PR, Lester S-KG, Brown MJ, French SC, Aniagyei SE, Wenzel TJ. 2006. Carboxymethylated cyclodextrin derivatives as chiral NMR discriminating agents. Tetrahedron Asym 17:1199–1208. Dinadayala P, Kaur D, Berg S, Amin AG, Vissa VD, Chatterjee D, Brennan PJ, Crick DC. 2006. Genetic basis for the synthesis of the immunomodulatory mannose caps of lipoarabinomannan in Mycobacterium tuberculosis. J Biol Chem 281:20027–20035. Disney MD, Hook DF, Namoto K, Seeberger PH, Seebach D. 2005. N-linked glycosylated b-peptides are resistant to degradation by glycoamidase A. Chem Biodiversity 2:1624–1634. Dmochowska B, Skorupa E, Pellowska-Januszek L, Czarkowska M, Sikorski A, Wisniewski A. 2006. Preparation, single-crystal X-ray diffraction and high-resolution NMR spectroscopic analyses of N-[(1,4-anhydro5-deoxy-2,3-O-isopropylidene-D,L-ribitol)-5-yl]trimethylammonium iodide. Carbohydr Res 341:1916–1921. Dondoni A, Catozzi N, Marra A. 2005. Concise and practical synthesis of Cglycosyl ketones from sugar benzothiazoles and their transformation into chiral tertiary alcohols. J Org Chem 70:9257–9268. 77 & HARVEY Dondoni A, Marra A. 2006. C-glycoside clustering on calix[4]arene, adamantane, and benzene scaffolds through 1,2,3-triazole linkers. J Org Chem 71:7546–7557. Dondoni A, Massi A, Minghini E. 2006. A facile and general entry to Cglycosyl (R)- and (S)-b-amino acid pairs from glycosyl cyanides through enamino ester intermediates. Synlett:539–542. Dondoni A, Nuzzi A. 2006. Access to piperidine imino-C-glycosides via stereoselective thiazole-based aminohomologation of pyranoses. J Org Chem 71:7574–7582. Dreisewerd K, Kölbl S, Peter-Katalinic J, Berkenkamp S, Pohlentz G. 2006. Analysis of native milk oligosaccharides directly from thin-layer chromatography plates by matrix-assisted laser desorption/ionization orthogonal-time-of-flight mass spectrometry with a glycerol matrix. J Am Soc Mass Spectrom 17:139–150. Dreisewerd K, Müthing J, Rohlfing A, Meisen I, Vukelic Z, Peter-Katalinic J, Hillenkamp F, Berkenkamp S. 2005. Analysis of gangliosides directly from thin-layer chromatography plates by infrared matrix-assisted laser desorption/ionization orthogonal time-of-flight mass spectrometry with a glycerol matrix. Anal Chem 77:4098–4107. Du W, Gervay-Hague J. 2005. Efficient synthesis of a-galactosyl ceramide analogues using glycosyl iodide donors. Org Lett 7:2063–2065. Du Y, Wei G, Cheng S, Hua Y, Linhardt RJ. 2006. HClO4 –SiO2 catalyzed glycosylation using sugar trichloroacetimidates as glycosyl donors. Tetrahedron Lett 47:307–310. Dubber M, Patel A, Sadalapure K, Aumüller I, Lindhorst TK. 2006. Synthesis of functionalized amphiphilic glycoconjugates and glycoclusters. Eur J Org Chem:5357–5366. Dubber M, Sperling O, Lindhorst TK. 2006. Oligomannoside mimetics by glycosylation of octopus glycosides and their investigation as inhibitors of type 1 fimbriae-mediated adhesion of Escherichia coli. Org Biomol Chem 4:3901–3912. Duchesne L, Tissot B, Rudd TR, Dell A, Fernig DG. 2006. N-glycosylation of fibroblast growth factor receptor 1 regulates ligand and heparan sulfate co-receptor binding. J Biol Chem 281:27178–27189. Duffy MS, Morris HR, Dell A, Appleton JA, Haslam SM. 2006. Protein glycosylation in Parelaphostrongylus tenuis—First description of the Gala1-3Gal sequence in a nematode. Glycobiology 16:854– 862. Dumon C, Bosso C, Utille JP, Heyraud A, Samain E. 2006. Production of Lewis x tetrasaccharides by metabolically engineered Escherichia coli. ChemBioChem 7:359–365. Dziadek S, Kowalczyk D, Kunz H. 2005. Synthetic vaccines consisting of tumor-associated MUC1 glycopeptide antigens and bovine serum albumin. Angew Chem Int Ed Engl 44:7624–7630. Edwards KJ, Allen S, Gibson BW, Campagnari AA. 2005a. Characterization of a cluster of three glycosyltransferase enzymes essential for Moraxella catarrhalis lipooligosaccharide assembly. J Bacteriol 187:2939–2947. Edwards KJ, Schwingel JM, Datta AK, Campagnari AA. 2005b. Multiplex PCR assay that identifies the major lipooligosaccharide serotype expressed by Moraxella catarrhalis clinical isolates. J Clin Microbiol 43:6139–6143. Ehara K, Saka S. 2005. Decomposition behavior of cellulose in supercritical water, subcritical water and their combined treatments. J Wood Sci 51:148–153. El Alaoui A, Schmidt F, Monneret C, Florent J-C. 2006. Protecting groups for glucuronic acid: Application to the synthesis of new paclitaxel (taxol) derivatives. J Org Chem 71:9628–9636. El Hamidi A, Tirsoaga A, Novikov A, Hussein A, Caroff M. 2005. Microextraction of bacterial lipid A: Easy and rapid method for mass spectrometric characterization. J Lipid Res 46:1773–1778. Eleutério MIP, Schimmel J, Ritter G, Costa MdC, Schmidt RR. 2006. Synthesis of saponins with allobetulin and glycyrrhetic acid as aglycones. Eur J Org Chem:5293–5304. 78 Enebro J, Karlsson S. 2006. Improved matrix-assisted laser desorption/ ionisation time-of-flight mass spectrometry of carboxymethyl cellulose. Rapid Commun Mass Spectrom 20:3693–3698. Engelmann K, Kinlough CL, Müller S, Razawi H, Baldus SE, Hughey RP, Hanisch F-G. 2005. Transmembrane and secreted MUC1 probes show trafficking-dependent changes in O-glycan core profiles. Glycobiology 15:1111–1124. Enomoto Y, Sugita M, Matsunaga I, Naka T, Sato A, Kawashima T, Shimizu K, Takahashi H, Norose Y, Yano I. 2005. Temperature-dependent biosynthesis of glucose monomycolate and its recognition by CD1restricted T cells. Biochem Biophys Res Commun 337:452–456. Erb WJ, Hanton SD, Owens KG. 2006. A study of gas-phase cationization in matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Rapid Commun Mass Spectrom 20:2165–2169. Ernst RK, Adams KN, Moskowitz SM, Kraig GM, Kawasaki K, Stead CM, Trent S, Miller SI. 2006. The Pseudomonas aeruginosa lipid A deacylase: Selection for expression and loss within the cystic fibrosis airway. J Bacteriol 188:191–201. Ervin LA, Ball LE, Crouch RK, Schey KL. 2005. Phosphorylation and glycosylation of bovine lens MP20. Invest Ophthalmol Vis Sci 46:627– 635. Erwin AL, Allen S, Ho DK, Bonthius PJ, Jarisch J, Nelson KL, Tsao DL, Unrath WCT, Watson MEJ, Gibson BW, Apicella MA, Smith AL. 2006. Role of lgtC in resistance of nontypeable Haemophilus influenzae strain R2866 to human serum. Infect Immun 74:6226–6235. Esua MF, Rauwald J-W. 2006. Novel bioactive maloyl glucans from Aloe vera gel: Isolation, structure elucidation and in vitro bioassays. Carbohydr Res 341:355–364. Ethier M, Krokhin O, Ens W, Standing KG, Wilkins JA, Perreault H. 2005. Global and site-specific detection of human integrin a5b1 glycosylation using tandem mass spectrometry and the StrOligo algorithm. Rapid Commun Mass Spectrom 19:721–727. Ethier M, Saba JA, Ens W, Standing KG, Perreault H. 2002. Automated structural assignment of derivatized complex N-linked oligosaccharides from tandem mass spectra. Rapid Commun Mass Spectrom 16:1743– 1754. Ethier M, Saba JA, Spearman M, Krokhin O, Butler M, Ens W, Standing KG, Perreault H. 2003. Application of the StrOligo algorithm for the automated structure assignment of complex N-linked glycans from glycoproteins using tandem mass spectrometry. Rapid Commun Mass Spectrom 17:2713–2720. Etienne G, Laval F, Villeneuve C, Dinadayala P, Abouwarda A, Zerbib D, Galamba A, Daffé M. 2005. The cell envelope structure and properties of Mycobacterium smegmatis mc2155: Is there a clue for the unique transformability of the strain? Microbiology 151:2075–2086. Faid V, Evjen G, Tollersrud O-K, Michalski J-C, Morelle W. 2006. Sitespecific glycosylation analysis of the bovine lysosomal a-mannosidase. Glycobiology 16:440–461. Faiz JA, Spencer N, Pikramenou Z. 2005. Acetylenic cyclodextrins for multireceptor architectures: Cups with sticky ends for the formation of extension wires and junctions. Org Biomol Chem 3:4239–4245. Falzarano D, Krokhin O, Wahl-Jensen V, Seebach J, Wolf K, Schnittler H-J, Feldmann H. 2006. Structure-function analysis of the soluble glycoprotein, sGP, of ebola virus. ChemBioChem 7:1605–1611. Fan G-T, Pan Y, Lu K-C, Cheng Y-P, Lin W-C, Lin S, Lin C-H, Wong C-H, Fang J-M, Lin C-C. 2005a. Synthesis of a-galactosyl ceramide and the related glycolipids for evaluation of their activities on mouse splenocytes. Tetrahedron 61:1855–1862. Fan X, She Y-M, Bagshaw RD, Callahan JW, Schachter H, Mahuran DJ. 2005b. Identification of the hydrophobic glycoproteins of Caenorhabditis elegans. Glycobiology 15:952–964. Faraco V, Palmieri G, Festa G, Monti M, Sannia G, Giardina P. 2005. A new subfamily of fungal subtilases: Structural and functional analysis of a Pleurotus ostreatus member. Microbiology 151:457–466. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Farah MA, Bose S, Lee J-H, Jung H-C, Kim Y. 2005. Analysis of glycated insulin by MALDI-TOF mass spectrometry. Biochim Biophys Acta 1725:269–282. Fauré R, Saura-Valls M, Brumer H, III, Planas A, Cottaz S, Driguez H. 2006. Synthesis of a library of xylogluco-oligosaccharides for active-site mapping of xyloglucan endo-transglycosylase. J Org Chem 71:5151– 5161. Fekete A, Hoogerhout P, Zomer G, Kubler-Kielb J, Schneerson R, Robbins JB, Pozsgay V. 2006. Synthesis of octa- and dodecamers of D-ribitol-1phosphate and their protein conjugates. Carbohydr Res 341:2037– 2048. Fenaille F, Parisod V, Visani P, Populaire S, Tabet J-C, Guy PA. 2006. Modifications of milk constituents during processing: A preliminary benchmarking study. Int Dairy J 16:728–739. Fernandez-Megia E, Correa J, Rodriguez-Meizoso I, Riguera R. 2006. A click approach to unprotected glycodendrimers. Macromolecules 39:2113– 2120. Ferrara C, Brunker P, Suter T, Moser S, Puntener U, Umana P. 2006a. Modulation of therapeutic antibody effector functions by glycosylation engineering: Influence of Golgi enzyme localization domain and coexpression of heterologous b-1, 4-N-acetylglucosaminyltransferase III and Golgi alpha-mannosidase II. Biotechnol Bioeng 93:851–861. Ferrara C, Stuart F, Sondermann P, Brünker P, Umaña P. 2006b. The carbohydrate at FcgRIIIa Asn-162. An element required for high affinity binding to non-fucosylated IgG glycoforms. J Biol Chem 281:5032–5036. Figueroa-Perez I, Stadelmaier A, Deininger S, von Aulock S, Hartung T, Schmidt RR. 2006. Synthesis of Staphylococcus aureus lipoteichoic acid derivatives for determining the minimal structural requirements for cytokine induction. Carbohydr Res 341:2901–2911. Figueroa-Perez I, Stadelmaier A, Morath S, Hartung T, Schmidt RR. 2005. Synthesis of structural variants of Staphylococcus aureus lipoteichoic acid (LTA). Tetrahedron Asym 16:493–506. Flieger M, Kantorová M, Halada P, Kuzma M, Pazoutová S, Stodulková E, Kolı́nská R. 2005. Oligosaccharides produced by submerged cultures of Claviceps africana and Claviceps sorghi. Folia Microbiol 50:198– 204. Fraser-Reid B, Lu J, Jayaprakash KN, López JC. 2006. Synthesis of a 28-mer oligosaccharide core of Mycobacterial lipoarabinomannan (LAM) requires only two n-pentenyl orthoester progenitors. Tetrahedron Asym 17:2449–2463. Fraysse N, Lindner B, Kacynski Z, Sharpova L, Holst O, Niehaus K, Poinot V. 2005. Sinorhizobium meliloti strain 1021 produces a low-molecularmass capsular polysaccharide that is a homopolymer of 3-deoxy-Dmanno-oct-2-ulosonic acid harboring a phospholipid anchor. Glycobiology 15:101–108. Freeze HH, Aebi M. 2005. Altered glycan structures: The molecular basis of congenital disorders of glycosylation. Curr Opin Struct Biol 15:490– 498. Freire T, D’Alayer J, Bay S. 2006. Efficient monitoring of enzymatic conjugation reaction by surface-enhanced laser desorption/ ionization time of flight mass spectrometry for process optimization. Bioconjug Chem 17:559–564. Fresno S, Jiménez N, Izquierdo L, Merino S, Corsaro MM, De Castro C, Parrilli M, Naldi T, Regué M, Tomás JM. 2006. The ionic interaction of Klebsiella pneumoniae K2 capsule and core lipopolysaccharide. Microbiology 152:1807–1818. Frolov A, Hoffmann P, Hoffmann R. 2006. Fragmentation behavior of glycated peptides derived from D-glucose, D-fructose and D-ribose in tandem mass spectrometry. J Mass Spectrom 41:1459–1469. Frolov A, Singer D, Hoffmann R. 2006. Site-specific synthesis of Amadorimodified peptides on solid phase. J Peptide Sci 12:389–395. Fujita K, Oura F, Nagamine N, Katayama T, Hiratake J, Sakata K, Kumagai H, Yamamoto K. 2005a. Identification and molecular cloning of a novel Mass Spectrometry Reviews DOI 10.1002/mas & glycoside hydrolase family of core 1 type O-glycan-specific endo-a-Nacetylgalactosaminidase from Bifidobacterium longum. J Biol Chem 280:37415–37422. Fujita K, Yamamoto K. 2006. A remodeling system for the oligosaccharide chains on glycoproteins with microbial endo-b-N-acetylglucosaminidases. Biochim Biophys Acta 1760:1631–1635. Fujita Y, Naka T, Doi T, Yano I. 2005b. Direct molecular mass determination of trehalose monomycolate from 11 species of mycobacteria by MALDI-TOF mass spectrometry. Microbiology 151:1443–1452. Fujita Y, Naka T, McNeil MR, Yano I. 2005c. Intact molecular characterization of cord factor (trehalose 6,6’-dimycolate) from nine species of mycobacteria by MALDI-TOF mass spectrometry. Microbiology 151:3403–3416. Fujiwaki T, Tasaka M, Takahashi N, Kobayashi H, Murakami Y, Shimada T, Yamaguchi S. 2006. Quantitative evaluation of sphingolipids using delayed extraction matrix-assisted laser desorption ionization time-offlight mass spectrometry with sphingosylphosphorylcholine as an internal standard. J Chromatogr B 832:97–102. Fujiyama K, Misaki R, Katsura A, Tanaka T, Furukawa A, Omasa T, Seki T. 2006. N-linked glycan structures of a mouse monoclonal antibody produced from tobacco BY2 suspension-cultured cells. J Biosci Bioeng 101:212–218. Fukui K, Kameyama A, Mukai Y, Takahashi K, Ikeda N, Akiyama Y, Narimatsu H. 2006. A computational study of structure-reactivity relationships in Na-adduct oligosaccharides in collision-induced dissociation reactions. Carbohydr Res 341:624–633. Fukuyama Y, Kolender AA, Nishioka M, Nonami H, Matulewicz MC, ErraBalsells R, Cerezo AS. 2005. Matrix-assisted ultraviolet laser desorption/ionization time-of-flight mass spectrometry of b-(1-3), b(1-4)-xylans from Nothogenia fastigiata using nor-harmane as matrix. Rapid Commun Mass Spectrom 19:349–358. Fumoto M, Hinou H, Matsushita T, Kurogochi M, Ohta T, Ito T, Yamada K, Takimoto A, Kondo H, Inazu T, Nishimura S-I. 2005a. Molecular transporter between polymer platforms: Highly efficient chemoenzymatic glycopeptide synthesis by the combined use of solid-phase and water-soluble polymer supports. Angew Chem Int Ed Engl 44:2534– 2537. Fumoto M, Hinou H, Ohta T, Ito T, Yamada K, Takimoto A, Kondo H, Shimizu H, Inazu T, Nakahara Y, Nishimura S-I. 2005b. Combinatorial synthesis of MUC1 glycopeptides: Polymer blotting facilitates chemical and enzymatic synthesis of highly complicated mucin glycopeptides. J Am Chem Soc 127:11804–11818. Furneaux RH, Landersjo CL, McCullough JL, Severn WB. 2005. A novel phosphatidylinositol manno-oligosaccharide (dPIM-8) from Gordonia sputi. Carbohydr Res 340:1618–1624. Furuike T, Sadamoto R, Niikura K, Monde K, Sakairi N, Nishimura S-I. 2005. Chemical and enzymatic synthesis of glycocluster having seven sialyl lewis X arrays using b-cyclodextrin as a key scaffold material. Tetrahedron 61:1737–1742. Fuse T, Ando H, Imamura A, Sawada N, Ishida H, Kiso M, Ando T, Li S-C, Li Y-T. 2006. Synthesis and enzymatic susceptibility of a series of novel GM2 analogs. Glycoconj J 23:329–343. Gama CI, Hsieh-Wilson LC. 2005. Chemical approaches to deciphering the glycosaminoglycan code. Curr Opin Chem Biol 9:609–619. Gandolfi-Donadı́o L, Gola G, de Lederkremer RM, Gallo-Rodriguez C. 2006. Synthesis of a-D-Galf-(1-2)-D-galactitol and a-D-Galf-(1-2)[b-D-Galf(1-3)]-D-galactitol, oligosaccharide derivatives from Bacteroides cellulosolvens glycoproteins. Carbohydr Res 341:2487–2497. Gao C, Miyoshi E, Uozumi N, Takamiya R, Wang X, Noda K, Gu J, Honke K, Wada Y, Taniguchi N. 2005a. Bisecting GlcNAc mediates the binding of annexin V to Hsp47. Glycobiology 15:1067–1075. Gao Y, Eguchi A, Kakehi K, Lee YC. 2005b. Synthesis and molecular recognition of carbohydrate-centered multivalent glycoclusters by a plant lectin RCA120. Bioorg Med Chem 13:6151–6157. 79 & HARVEY Geiser H, Silvescu C, Reinhold V. 2006. Structural approaches to glycoproteomics. In: Smejkal GB, Lazarev A, editors. Separation methods in proteomics. Boca Raton, FL: CRC Press. pp 321-343. Gemma E, Lahmann M, Oscarson S. 2006. Synthesis of monodeoxy analogues of the trisaccharide a-D-Glcp-(1-3)-a-D-Manp-(1-2)-a-DManpOMe recognised by Calreticulin/Calnexin. Carbohydr Res 341:1533–1542. Gerlach D, Schlott B, Zähringer U, Schmidt K-H. 2005. N-acetyl-Dgalactosamine/N-acetyl-D-glucosamine-recognizing lectin from the snail Cepaea hortensis: Purification, chemical characterization, cloning and expression in E. coli. FEMS Immunol Med Microbiol 43:223– 232. Geyer H, Geyer R. 2006. Strategies for analysis of glycoprotein glycosylation. Biochim Biophys Acta 1764:1853–1869. Geyer H, Wuhrer M, Resemann A, Geyer R. 2005. Identification and characterization of keyhole limpet hemocyanin N-glycans mediating cross-reactivity with Schistosoma mansoni. J Biol Chem 280:40731– 40748. Ghera BB, Fache F, Parrot-Lopez H. 2006. Use of the olefin metathesis reaction for highly efficient b-cyclodextrin modification. Tetrahedron 62:4807–4813. Ghesquière B, Van Damme J, Martens L, Vandekerckhove J, Gevaert K. 2006. Proteome-wide characterization of N-glycosylation events by diagonal chromatography. J Proteome Res 5:2438–2447. Ghosh P, Ghosal P, Thakur S, Lerouge P, Loutelier-Bourhis CL, Driouich A, Ray B. 2005. Polysaccharides from Sesamum indicum meal: Isolation and structural features. Food Chem 90:719–726. Gibbons HS, Kalb SR, Cotter RJ, Raetz CRH. 2005. Role of Mg2þ and pH in the modification of Salmonella lipid A after endocytosis by macrophage tumour cells. Mol Microbiol 55:425–440. Gibeaut DM, Pauly M, Bacic A, Fincher GB. 2005. Changes in cell wall polysaccharides in developing barley (Hordeum vulgare) coleoptiles. Planta 221:729–738. Gibson KJC, Gilleron M, Constant P, Sichi B, Puzo G, Besra GS, Nigou J. 2005. A lipomannan variant with strong TLR-2-dependent proinflammatory activity in Saccharothrix aerocolonigenes. J Biol Chem 280:28347–28356. Gilleron M, Garton NJ, Nigou J, Brando T, Puzo G, Sutcliffe IC. 2005. Characterization of a truncated lipoarabinomannan from the actinomycete Turicella otitidis. J Bacteriol 187:854–861. Gilleron M, Lindner B, Puzo G. 2006. MS/MS Approach for characterization of the fatty acid distribution on mycobacterial phosphatidyl-myoinositol mannosides. Anal Chem 78:8543–8548. Gilleron M, Nigou J, Nicolle D, Quesniaux V, Puzo G. 2006. The acylation state of mycobacterial lipomannans modulates innate immunity response through toll-like receptor 2. Chem Biol 13:39–47. Glebko LI, Krasovskaj NP, Strigina LI, Ulanova KP, Denisenko VA, Dmitrenok PS. 2002. Triterpene glycosides from Pulsatilla chinensis. Russ Chem Bull 51:1945–1950. Glover KJ, Weerapana E, Chen MM, Imperiali B. 2006. Direct biochemical evidence for the utilization of UDP-bacillosamine by PglC, an essential glycosyl-1-phosphate transferase in the Campylobacter jejuni N-linked glycosylation pathway. Biochemistry 45:5343–5350. Glover KJ, Weerapana E, Imperiali B. 2005. In vitro assembly of the undecaprenylpyrophosphate linked heptasaccharide for prokaryotic N-linked glycosylation. Proc Natl Acad Sci USA 102:14255– 14259. Glover KJ, Weerapana E, Numao S, Imperiali B. 2005. Chemoenzymatic synthesis of glycopeptides with PglB, a bacterial oligosaccharyl transferase from Campylobacter jejuni. Chem Biol 12:1311–1315. Godevac D, Mandic B, Vajs V, Teševic V, Menkovic N, Janackovic P, Milosavljevic S. 2006. Triterpenoid saponins and iridoid glycosides from the aerial parts of Cephalaria pastricensis. Biochem Syst Ecol 34:890–893. 80 Goldberg D, Bern M, Li B, Lebrilla CB. 2006. Automatic determination of Oglycan structure from fragmentation spectra. J Proteome Res 5:1429– 1434. Goldberg D, Sutton-Smith M, Paulson J, Dell A. 2005. Automatic annotation of matrix-assisted laser desorption/ionization N-glycan spectra. Proteomics 5:865–875. Gomes RA, Miranda HV, Silva MS, Graca G, Coelho AV, Ferreira AE, Cordeiro C, Freire AP. 2006. Yeast protein glycation in vivo by methylglyoxal: Molecular modification of glycolytic enzymes and heat shock proteins. FEBS J 273:5273–5287. Gomez SR, Xing DK-L, Corbel MJ, Coote J, Parton R, Yuen C-T. 2006. Development of a carbohydrate binding assay for the B-oligomer of pertussis toxin and toxoid. Anal Biochem 356:244–253. Gómez-Garcı́a M, Benito JM, Rodrı́guez-Lucena DR, Yu J-X, Chmurski K, Mellet CO, Gallego RG, Maestre A, Defaye J, Fernández JMG. 2005. Probing secondary carbohydrate-protein interactions with highly dense cyclodextrin-centered heteroglycoclusters: The heterocluster effect. J Am Chem Soc 127:7970–7971. Gormann R, Kaloga M, Ferreira D, Marais JPJ, Kolodziej H. 2006. Newbouldiosides A-C, phenylethanoid glycosides from the stem bark of Newbouldia laevis. Phytochemistry 67:805–811. Goto K, Miura T, Mizuno M. 2005. Synthesis of peptides and oligosaccharides by using a recyclable fluorous tag. Tetrahedron Lett 46:8293–8297. Goubet F, Ström A, Quéméner B, Stephens E, Williams MAK, Dupree P. 2006. Resolution of the structural isomers of partially methylesterified oligogalacturonides by polysaccharide analysis using carbohydrate gel electrophoresis. Glycobiology 16:29–35. Gray JSS, Montgomery R. 2006. Asymmetric glycosylation of soybean seed coat peroxidase. Carbohydr Res 341:198–209. Graziani A, Amer H, Zamyatina A, Hofinger A, Kosma P. 2005. Synthesis of C-glycosides related to glycero-b-D-manno-heptoses. Tetrahedron Asym 16:167–175. Greimel P, Jabs S, Storch S, Cherif S, Honke K, Braulke T, Thiem J. 2006. In vitro sulfation of N-acetyllactosaminide by soluble recombinant human b-Gal-30 -sulfotransferase. Carbohydr Res 341:918–924. Griebl A, Lange T, Weber H, Milacher W, Sixta H. 2006. Xylooligosaccharide (XOS) formation through hydrothermolysis of xylan derived from viscose process. Macromol Symp 232:107–120. Grombe R, Gouzy M-F, Nitschke M, Komber H, Werner C. 2006. Preparation and characterization of glycosylated maleic anhydride copolymer thin films. Colloids Surf A 284–285:295–300. Grün CH, van Vliet SJ, Schiphorst WECM, Bank CMC, Meyer S, van Die I, van Kooyk Y. 2006. One-step biotinylation procedure for carbohydrates to study carbohydrate-protein interactions. Anal Biochem 254:54–63. Gu G, Liu H, Pinto BM. 2006. Facile synthesis of sulfonium ion derivatives of 1,5-anhydro-5-thio-L-fucitol as potential a-L-fucosidase inhibitors. Carbohydr Res 341:2478–2486. Gu L, Lin Y, Qu L, Sun Y-P. 2006. Carbon nanotubes as a scaffold to display paired sugars in solution. Biomacromolecules 7:400–402. Guérardel Y, Chang L-Y, Maes E, Huang C-J, Khoo K-H. 2006. Glycomic survey mapping of zebrafish identifies unique sialylation pattern. Glycobiology 16:244–257. Guérardel Y, Leleu D, Coppin A, Liénard L, Slomianny C, Strecker G, Ball S, Tomavo S. 2005. Amylopectin biogenesis and characterization in the protozoan parasite Toxoplasma gondii, the intracellular development of which is restricted in the HepG2 cell line. Microbes Infect 7:41–48. Guerrini M, Guglieri S, Santarsiero R, Vismara E. 2005. Synthesis and characterisation of hexa- and tetrasaccharide mimics from acetobromomaltotriose and acetobromomaltose, and of C-disaccharide mimics from acetobromoglucose, obtained by electrochemical reduction on silver. Tetrahedron Asym 16:243–253. Guillaumie F, Justesen SFL, Mutenda KE, Roepstorff P, Jensen KJ, Thomas ORT. 2006. Fractionation, solid-phase immobilization and chemical Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES degradation of long pectin oligogalacturonides. Initial steps towards sequencing of oligosaccharides. Carbohydr Res 341:118–129. Gupta S, Sage A, Singh AK. 2005. Screening and confirmation of recombinant human erythropoietin and darbepoietin-a in spiked plasma samples from drug-free horses. Anal Chim Acta 552:96– 109. Gur’yanov O, Gorshkova T, Kabel M, Schols H, Van Dam JEG. 2006. Structural characterization of tissue-specific galactan from flax fibers by 1 H NMR and MALDI TOF mass spectrometry. Russ J Bioorg Chem 32:558–567. Gustavsson MT, Persson PV, Iversen T, Martinelle M, Hult K, Teeri TT, Brumer H III. 2005. Modification of cellulose fiber surfaces by use of a lipase and a xyloglucan endotransglycosylase. Biomacromolecules 6:196–203. Hackenberger CPR, O’Reilly MK, Imperiali B. 2005. Improving glycopeptide synthesis: A convenient protocol for the preparation of bglycosylamines and the synthesis of glycopeptides. J Org Chem 70: 3574–3578. Hada N, Jin Y, Takeda T, Ohtsuka I, Yokoyama S. 2006a. Syntheses of new model compounds related to an antigenic epitope from Bupleurum falcatum L. and their distributions in various ganglioside-phospholipid monolayers. Chem Pharm Bull 54:1281–1284. Hada N, Oka J, Nishiyama A, Takeda T. 2006b. Stereoselective synthesis of 1,2-cis-galactosides: Synthesis of a glycolipid containing Gala1-6Gal component from Zygomycetes species. Tetrahedron Lett 47:6647– 6650. Hada N, Sato K, Jin Y, Takeda T. 2005. Synthesis of new peptidic glycoclusters derived from b-alanine. Part 2: Optionally modulated distance between side-chain branched points. Chem Pharm Bull 53: 1131–1135. Hada N, Sonoda Y, Takeda T. 2006. Synthesis of a novel glycosphingolipid from the millipede, Parafontaria laminata armigera, and the assembly of its carbohydrate moiety into multivalent structures. Carbohydr Res 341:1341–1352. Hagihara S, Totani K, Ito Y. 2006. Exploration of oligosaccharide-protein interactions in glycoprotein quality control by synthetic approaches. Chem Record 6:290–302. Haginoya E, Hojo H, Nakahara Y, Nakahara Y, Nabeshima K, Toole BP, Watanabe Y. 2006. Synthesis of a glycosylated peptide thioester by the Boc strategy and its application to segment condensation. Biosci Biotechnol Biochem 70:1338–1349. Hainrichson M, Pokrovskaya V, Shallom-Shezifi D, Fridman M, Belakhov V, Shachar D, Yaron S, Baasov T. 2005. Branched aminoglycosides: Biochemical studies and antibacterial activity of neomycin B derivatives. Bioorg Med Chem 13:5797–5807. Hajjar AM, Harvey MD, Shaffer SA, Goodlett DR, Sjöstedt A, Edebro H, Forsman M, Byström M, Pelletier M, Wilson CB, Miller SI, Skerrett SJ, Ernst RK. 2006. Lack of in vitro and in vivo recognition of Francisella tularensis subspecies lipopolysaccharide by toll-like receptors. Infect Immun 74:6730–6738. Halkes KM, Carvalho de Souza A, Maljaars CEP, Gerwig GJ, Kamerling JP. 2005. A facile method for the preparation of gold glyconanoparticles from free oligosaccharides and their applicability in carbohydrateprotein interaction studies. Eur J Org Chem:3650–3659. Hamcerencu M, Popa M, Riess G, Ritter H, Alupei V. 2005. Unsaturated esters of cyclodextrin—Synthesis and characterization. Cellulose Chem Technol 39:389–413. Hamed AI, Plaza A, Balestrieri ML, Mahalel UA, Springuel IV, Oleszek W, Pizza C, Piacente S. 2006. Cardenolide glycosides from Pergularia tomentosa and their proapoptotic activity in Kaposi’s sarcoma cells. J Nat Prod 69:1319–1322. Hanashima S, Inamori K-I, Manabe S, Taniguchi N, Ito Y. 2006. Systematic synthesis of bisubstrate-type inhibitors of N-acetylglucosaminyltransferases. Chem Eur J 12:3449–3462. Mass Spectrometry Reviews DOI 10.1002/mas & Haneda K, Takeuchi M, Tagashira M, Inazu T, Toma K, Isogai Y, Hori M, Kobayashi K, Takeuchi M, Takegawa M, Yamamoto M. 2006. Chemoenzymatic synthesis of eel calcitonin glycosylated at two sites with the same and different carbohydrate structures. Carbohydr Res 341:181– 190. Hanneman AJ, Rosa JC, Ashline D, Reinhold VN. 2006. Isomer and glycomer complexities of core GlcNAcs in Caenorhabditis elegans. Glycobiology 16:874–890. Haque A, Kotake T, Tsumuraya Y. 2005. Mode of action of b-glucuronidase from Aspergillus niger on the sugar chains of arabinogalactan-protein. Biosci Biotechnol Biochem 69:2170–2177. Harcum SW. 2005. Protein glycosylation. In: Ozturk SS, Hu W-S, editors. Cell culture technology for pharmaceutical and cell-based therapies. Boca Raton, FL: CRC Press. pp 113-154. Harrison RL, Jarvis DL. 2006. Protein N-glycosylation in the baculovirusinsect cell expression system and engineering of insect cells to produce ‘‘mammalianized’’ recombinant glycoproteins. Adv Virus Res 68:159– 191. Hartley G, Taylor R, Prior J, Newstead S, Hitchen PG, Morris HR, Dell A, Titball RW. 2006. Grey variants of the live vaccine strain of Francisella tularensis lack lipopolysaccharide O-antigen, show reduced ability to survive in macrophages and do not induce protective immunity in mice. Vaccine 24:989–996. Hartman J, Albertsson A-C, Sjöberg J. 2006. Surface- and bulk-modified galactoglucomannan hemicellulose films and film laminates for versatile oxygen barriers. Biomacromolecules 7:1983–1989. Harvey DJ. 1999. Matrix-assisted laser desorption/ionization mass spectrometry of carbohydrates. Mass Spectrom Rev 18:349–451. Harvey DJ. 2005a. Fragmentation of negative ions from carbohydrates: Part 2, Fragmentation of high-mannose N-linked glycans. J Am Soc Mass Spectrom 16:631–646. Harvey DJ. 2005b. Fragmentation of negative ions from carbohydrates: Part 1; Use of nitrate and other anionic adducts for the production of negative ion electrospray spectra from N-linked carbohydrates. J Am Soc Mass Spectrom 16:622–630. Harvey DJ. 2005c. Fragmentation of negative ions from carbohydrates: Part 3, Fragmentation of hybrid and complex N-linked glycans. J Am Soc Mass Spectrom 16:647–659. Harvey DJ. 2005d. Proteomic analysis of glycosylation: Structural determination of N- and O-linked glycans by mass spectrometry. Expert Rev Proteomics 2:87–101. Harvey DJ. 2005e. Structural determination of N-linked glycans by matrixassisted laser desorption/ionization and electrospray ionization mass spectrometry. Proteomics 5:1774–1786. Harvey DJ. 2006. Analysis of carbohydrates and glycoconjugates by matrixassisted laser desorption/ionization mass spectrometry: An update covering the period 1999–2000. Mass Spectrom Rev 25:595–662. Harvey DJ. 2008a. Analysis of carbohydrates and glycoconjugates by matrixassisted laser desorption/ionization mass spectrometry: An update covering the period 2001–2002. Mass Spectrom Rev 27:125–201. Harvey DJ. 2009. Analysis of carbohydrates and glycoconjugates by matrixassisted laser desorption/ionization mass spectrometry: An update covering the period 2003–2004. Mass Spectrom Rev 28:273–361. Harvey DJ, Bousfield GR. 2005. Differentiation between sulphated and phosphated carbohydrates in low-resolution matrix-assisted laser desorption/ionization mass spectra. Rapid Commun Mass Spectrom 19:287–288. Harvey DJ, Dwek RA, Rudd PM. 2006. Determining the structure of glycan moieties by mass spectrometry. In: Coligan JE, Dunn BM, Speicher DW, Wingfield PT, editors. Current protocols in protein science. New York: J. Wiley and Sons Inc. p UNIT 12.17. Hasegawa T, Umeda M, Numata M, Li C, Bae A-H, Fujisawa T, Haraguchi S, Sakurai K, Shinkai S. 2006. ‘Click chemistry’ on polysaccharides: A convenient, general, and monitorable approach to develop (1-3)-b-D- 81 & HARVEY glucans with various functional appendages. Carbohydr Res 341: 35–40. Hasegawa Y, Miyauchi M, Takashima Y, Yamaguchi H, Harada A. 2005. Supramolecular polymers formed from b-cyclodextrins dimer linked by poly(ethylene glycol) and guest dimers. Macromolecules 38:3724– 3730. Hashimoto K, Goto S, Kawano S, Aoki-Kinoshita KF, Ueda N, Hamajima M, Kawasaki T, Kanehisa M. 2006. KEGG as a glycome informatics resource. Glycobiology 16:63R–70R. Haslam SM, Khoo KH, Dell A. 2006. Sequencing of oligosaccharides and glycoproteins. In: Wong C-H, editor. Carbohydrate-based drug discovery. Hoboken, NJ: Wiley VCH. pp 461–482. Haslam SM, North SJ, Dell A. 2006. Mass spectrometric analysis of N- and Oglycosylation of tissues and cells. Curr Opin Struct Biol 16:584–591. Hattori K, Kenmoku A, Mizuguchi T, Ikeda D, Mizuno M, Inazu T. 2006. Saccharide-branched cyclodextrins as targeting drug carriers. J Incl Phenom Macrocyclic Chem 56:9–15. Hayase F, Usui T, Watanabe H. 2006. Chemistry and some biological effects of model melanoidins and pigments as Maillard intermediates. Mol Nutr Food Res 50:1171–1179. Hayashida O, Takaoka Y, Hamachi I. 2005. Synthesis and guest-binding study of polytopic multi(cyclophane) hosts. Tetrahedron Lett 46:6589–6592. Hederos M, Konradsson P. 2005a. Synthesis of the core tetrasaccharide of Trypanosoma cruzi glycoinositolphospholipids: Manp(1-6)-Manp(14)-6-(2-aminoethylphosphonic acid)-GlcNp(1-6)-myo-Ins-1-PO4. J Org Chem 70:7196–7207. Hederos M, Konradsson P. 2005b. Efficient routes to ethyl-2-deoxy-2phthalimido-1-b-D-thio-galactosamine derivatives via epimerization of the corresponding glucosamine compounds. J Carbohydr Chem 24:297–320. Heiner S, Detert H, Kuhn A, Kunz H. 2006. Hydrophilic photolabelling of glycopeptides from the murine liver-intestine (LI) cadherin recognition domain. Bioorg Med Chem 14:6149–6164. Higai K, Aoki Y, Azuma Y, Matsumoto K. 2005. Glycosylation of sitespecific glycans of a1-acid glycoprotein and alterations in acute and chronic inflammation. Biochim Biophys Acta 1725:128–135. Higson AP, Ross AJ, Tsvetkov YE, Routier FH, Sizova OV, Ferguson MAJ, Nikolaev AV. 2005. Synthetic fragments of antigenic lipophosphoglycans from Leishmania major and Leishmania mexicana and their use for characterisation of the Leishmania elongating a-D-mannopyranosylphosphate transferase. Chem Eur J 11:2019–2030. Hilz H, de Jong LE, Kabel MA, Schols HA, Voragen AGJ. 2006. A comparison of liquid chromatography, capillary electrophoresis, and mass spectrometry methods to determine xyloglucan structures in black currants. J Chromatogr A 1133:275–286. Hinckley MB, Reynolds CM, Ribeiro AA, McGrath SC, Cotter RJ, Lauw FN, Golenbock DT, Raetz CRH. 2005. A Leptospira interrogans enzyme with similarity to yeast Ste14p that methylates the 1-phosphate group of lipid A. J Biol Chem 280:30214–30224. Hinz SWA, Pastink MI, van den Broek LAM, Vincken J-P, Voragen AGJ. 2005a. Bifidobacterium longum endogalactanase liberates galactotriose from type I galactans. Appl Environ Microbiol 71:5501–5510. Hinz SWA, Verhoef R, Schols HA, Vincken J-P, Voragen AGJ. 2005b. Type I arabinogalactan contains b-D-Galp-(1-3)-b-D-Galp structural elements. Carbohydr Res 340:2135–2143. Hirano K, Sakai S, Ishikawa T, Avci FY, Linhardt RJ, Toida T. 2005. Preparation of the methyl ester of hyaluronan and its enzymatic degradation. Carbohydr Res 340:2297–2304. Hitchen PG, Dell A. 2005. Bacterial glycoproteomics. Microbiology 152:1575–1580. Hocquelet C, Blu J, Jankowski CK, Arseneau S, Buisson D, Mauclaire L. 2006. Synthesis of calixarene-cyclodextrin coupling products. Tetrahedron 62:11963–11971. 82 Hodoniczky J, Zheng YZ, James DC. 2005. Control of recombinant monoclonal antibody effector functions by Fc N-glycan remodeling in vitro. Biotechnol Prog 21:1644–1652. Hoffman M, Jia Z, Peña MJ, Cash M, Harper A, Blackburn ARI, Darvill A, York WS. 2005. Structural analysis of xyloglucans in the primary cell walls of plants in the subclass Asteridae. Carbohydr Res 340:1826– 1840. Höije A, Sandström C, Roubroeks JP, Andersson R, Gohil S, Gatenholm P. 2006. Evidence of the presence of 2-O-b-D-xylopyranosyl-a-Larabinofuranose side chains in barley husk arabinoxylan. Carbohydr Res 341:2959–2966. Hojo H, Matsumoto Y, Nakahara Y, Ito E, Suzuki Y, Suzuki M, Suzuki A, Nakahara Y. 2005. Chemical synthesis of 23 kDa glycoprotein by repetitive segment condensation: A synthesis of MUC2 basal motif carrying multiple O-GalNAc moieties. J Am Chem Soc 127:13720– 13725. Hölemann A, Stocker BL, Seeberger PH. 2006. Synthesis of a core arabinomannan oligosaccharide of Mycobacterium tuberculosis. J Org Chem 71:8071–8088. Holmes BJ, Petrucci GA. 2006. Water-soluble oligomer formation from acidcatalyzed reactions of levoglucosan in proxies of atmospheric aqueous aerosols. Environ Sci Technol 40:4983–4989. Holtan S, Bruheim P, Skjak-Braek G. 2006. Mode of action and subsite studies of the guluronan block-forming mannuronan C-5 epimerases AlgE1 and AlgE6. Biochem J 395:319–329. Hossler P, Goh L-T, Lee MM, Hu W-S. 2006. GlycoVis: Visualizing glycan distribution in the protein N-glycosylation pathway in mammalian cells. Biotechnol Bioeng 95:946–960. Hotha S, Kashyap S. 2006a. ‘‘Click chemistry’’ inspired synthesis of pseudooligosaccharides and amino acid glycoconjugates. J Org Chem 71:364– 367. Hotha S, Kashyap S. 2006b. ‘‘Click chemistry’’ inspired synthesis of pseudooligosaccharides and amino acid glycoconjugates. J Org Chem 71:852. Hsu J, Chang SJ, Franz AH. 2006. MALDI-TOF and ESI-MS analysis of oligosaccharides labeled with a new multifunctional oligosaccharide tag. J Am Soc Mass Spectrom 17:194–204. Huang K-T, Wu B-C, Lin C-C, Luo S-C, Chen C, Wong C-H, Lin C-C. 2006. Multi-enzyme one-pot strategy for the synthesis of sialyl Lewis Xcontaining PSGL-1 glycopeptide. Carbohydr Res 341:2151–2155. Huang R, Mendis E, Kim S-K. 2005. Improvement of ACE inhibitory activity of chitooligosaccharides (COS) by carboxyl modification. Bioorg Med Chem 13:3649–3655. Huang Y, Konse T, Mechref Y, Novotny MV. 2002. Matrix-assisted laser desorption/ionization mass spectrometry compatible b-elimination of O-linked oligosaccharides. Rapid Commun Mass Spectrom 16:1199– 1204. Huck CW, Bakry R, Huber LA, Bonn GK. 2006. Progress in capillary electrophoresis coupled to matrix-assisted laser desorption/ionizationtime of flight mass spectrometry. Electrophoresis 27:2063–2074. Ibey BL, Beier HT, Rounds RM, Coté GL, Yadavalli VK, Pishko MV. 2005. Competitive binding assay for glucose based on glycodendrimerfluorophore conjugates. Anal Chem 77:7039–7046. Ibrahem I, Córdova A. 2005. Amino acid catalyzed direct enantioselective formation of carbohydrates: One-step de novo synthesis of ketoses. Tetrahedron Lett 46:3363–3367. Iglesias N, Abelenda JA, Rodino M, Sampedro J, Revilla G, Zarra I. 2006. Apoplastic glycosidases active against xyloglucan oligosaccharides of Arabidopsis thaliana. Plant Cell Physiol 47:55–63. Iijima J, Zhao Y, Isaji T, Kameyama A, Nakaya S, Wang X, Ihara H, Cheng X, Nakagawa T, Miyoshi E, Kondo A, Narimatsu H, Taniguchi N, Gu J. 2006. Cell-cell interaction-dependent regulation of N-acetylglucosaminyltransferase III and the bisected N-glycans in GE11 epithelial cells: Involvement of E-cadherin-mediated cell adhesion. J Biol Chem 281:13038–13046. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Immerzeel P, Eppink MM, De Vries SC, Schols HA, Voragen AGJ. 2006. Carrot arabinogalactan proteins are interlinked with pectins. Physiol Plant 128:18–28. Imre T, Schlosser G, Pocsfalvi G, Siciliano R, Molnár-Szöllsi É, Kremmer T, Malorni A, Vékey K. 2005. Glycosylation site analysis of human alpha1-acid glycoprotein (AGP) by capillary liquid chromatography– electrospray mass spectrometry. J Mass Spectrom 40:1472–1483. Inamori K, Mita S, Gu J, Mizuno-Horikawa Y, Miyoshi E, Dennis JW, Taniguchi N. 2006. Demonstration of the expression and the enzymatic activity of N-acetylglucosaminyltransferase IX in the mouse brain. Biochim Biophys Acta 1760:678–684. Inamura S, Fujimoto Y, Kawasaki A, Shiokawa Z, Woelk E, Heine H, Lindner B, Inohara N, Kusumoto S, Fukase K. 2006. Synthesis of peptidoglycan fragments and evaluation of their biological activity. Org Biomol Chem 4:232–242. Inforzato A, Peri G, Doni A, Garlanda C, Mantovani A, Bastone A, Carpentieri A, Amoresano A, Pucci P, Roos A, Daha MR, Vincenti S, Gallo G, Carminati P, De Santis R, Salvatori G. 2006. Structure and function of the long pentraxin PTX3 glycosidic moiety: Fine-tuning of the interaction with C1q and complement activation. Biochemistry 45:11540–11551. Inoue Y, Miyauchi M, Nakajima H, Takashima Y, Yamaguchi H, Harada A. 2006. Self-threading of a poly(ethylene glycol) chain in a cyclodextrinring: Control of the exchange dynamics by chain length. J Am Chem Soc 128:8994–8995. Ishiwata A, Akao H, Ito Y. 2006. Stereoselective synthesis of a fragment of mycobacterial arabinan. Org Lett 8:5525–5528. Ishiwata A, Akao H, Ito Y, Sunagawa M, Kusunose N, Kashiwazaki Y. 2006. Synthesis and TNF-a inducing activities of mycoloyl-arabinan motif of mycobacterial cell wall components. Bioorg Med Chem 14:3049– 3061. Ishiwata A, Ohta S, Ito Y. 2006. A stereoselective 1,2-cis glycosylation toward the synthesis of a novel N-linked glycan from the Gram-negative bacterium, Campylobacter jejuni. Carbohydr Res 341:1557–1573. Ito H, Kameyama A, Sato T, Kiyohara K, Nakahara Y, Narimatsu H. 2005. Molecular-weight-tagged glycopeptide library: Efficient construction and applications. Angew Chem Int Ed Engl 44:4547– 4549. Ito K, Miyagawa K, Matsumoto M, Yabuno S, Kawakami N, Hamaguchi T, Iizuka M, Minamiura N. 2006. Evidence for the transglycosylation of complex type oligosaccharides of glycoproteins by endo-b-N-acetylglucosaminidase HS. Arch Biochem Biophys 454:89–99. Itoh Y, Wang X, Hinnebusch J, Preston JF III, Romeo T. 2005. Depolymerization of b-1,6-N-acetyl-D-glucosamine disrupts the integrity of diverse bacterial biofilms. J Bacteriol 187:382–387. Ivleva VB, Sapp LM, O’Connor PB, Costello CE. 2005. Ganglioside analysis by thin-layer chromatography matrix-assisted laser desorption/ionization orthogonal time-of-flight mass spectrometry. J Am Soc Mass Spectrom 16:1552–1560. Izumi M, Tsuruta O, Kajihara Y, Yazawa S, Yuasa H, Hashimoto H. 2005. Synthesis and evaluation of 5-thio-L-fucose-containing oligosaccharide. Chem Eur J 11:3032–3038. Jacques S, Rich JR, Ling CC, Bundle DR. 2006. Chemoenzymatic synthesis of GM3 and GM2 gangliosides containing a truncated ceramide functionalized for glycoconjugate synthesis and solid phase applications. Org Biomol Chem 4:142–154. Jacquet R, Favetta P, Elfakir C, Lafosse M. 2005. Characterization of a new methylated b-cyclodextrin with a low degree of substitution by matrixassisted laser desorption/ionization mass spectrometry and liquid chromatography using evaporative light scattering detection. J Chromatogr A 1083:106–112. Jain N, Kumar A, Chauhan S, Chauhan SMS. 2005. Chemical and biochemical transformations in ionic liquids. Tetrahedron 61:1015– 1060. Mass Spectrometry Reviews DOI 10.1002/mas & Jang-Lee J, North SJ, Sutton-Smith M, Goldberg D, Panico M, Morris H, Haslam S, Dell A. 2006. Glycomic profiling of cells and tissues by mass spectrometry: Fingerprinting and sequencing methodologies. Methods Enzymol 415:59–86. Jankowska M, Mada J. 2005. Glycosylation of allyl 2-acetamido-4,6-Obenzylidene-2-deoxy-a-D-glucopyranoside with bulky substituted glycosyl donors. Carbohydr Res 340:2048–2051. Janssen S, Schmidt RR. 2005. Synthesis of ganglioside mimics for binding studies with myelin-associated glycoprotein (MAG). J Carbohydr Chem 24:611–647. Jayachandran R, Radcliffe CM, Royle L, Harvey DJ, Dwek RA, Rudd PM, Karande AA. 2006. Oligosaccharides modulate the apoptotic activity of glycodelin. Glycobiology 16:1052–1063. Jia Z, Cash M, Darvill AG, York WS. 2005. NMR characterization of endogenously O-acetylated oligosaccharides isolated from tomato (Lycopersicon esculentum) xyloglucan. Carbohydr Res 340:1818– 1825. Jin Y, Hada N, Oka J, Kanie O, Daikoku S, Kanie Y, Yamada H, Takeda T. 2006. Syntheses of model compounds related to an antigenic epitope in pectic polysaccharides from Bupleurum falcatum L. (II). Chem Pharm Bull 54:485–492. Joddar B, Ramamurthi A. 2006. Elastogenic effects of exogenous hyaluronan oligosaccharides on vascular smooth muscle cells. Biomaterials 27:5698–5707. Johansson SMC, Arnberg N, Elofsson M, Wadell G, Kihlberg J. 2005. Multivalent HSA conjugates of 3-sialyllactose are potent inhibitors of adenoviral cell attachment and infection. ChemBioChem 6:358– 364. Johnston BD, Jensen HH, Pinto BM. 2006. Synthesis of sulfonium sulfate analogues of disaccharides and their conversion to chain-extended homologues of salacinol: New glycosidase inhibitors. J Org Chem 71:1111–1118. Jonke S, Liu K-G, Schmidt RR. 2006. Solid-phase oligosaccharide synthesis of a small library of N-glycans. Chem Eur J 12:1274–1290. Joosten JAF, Tholen NTH, El Maate FA, Brouwer AJ, van Esse GW, Rijkers DTS, Liskamp RMJ, Pieters RJ. 2006. High-yielding microwaveassisted synthesis of triazole-linked glycodendrimers by coppercatalyzed [3 þ 2] cycloaddition. Eur J Org Chem:3182–3185. Jørgensen CT, Svendsen A, Brask J. 2005. Enzymatic synthesis of oligosaccharides from branched cyclodextrins. Carbohydr Res 340:1233–1237. Jung H, Kim YH, Kim S. 2005. Structural basis for the presence of a monoglucosylated oligosaccharide in mature glycoproteins. Biochem Biophys Res Commun 331:100–106. Jung Y, Park H, Cho E, Jung S. 2005. Structural analyses of novel glycerophosphorylated a-cyclosophorohexadecaoses isolated from X. campestris pv. campestris. Carbohydr Res 340:673–677. Jürs S, Thiem J. 2005. Alternative approaches towards glycosylated eightmembered ring compounds employing Claisen rearrangement of mono and disaccharide allyl vinyl ether precursors. Tetrahedron Asym 16:1631–1638. Kahler CM, Lyons-Schindler S, Choudhury B, Glushka J, Carlson RW, Stephens DS. 2006. O-acetylation of the terminal N-acetylglucosamine of the lipooligosaccharide inner core in Neisseria meningitidis. Influence on inner core structure and assembly. J Biol Chem 281:19939–19948. Kajimura J, Rahman A, Hsu J, Evans MR, Gardner KH, Rick PD. 2006. Oacetylation of the enterobacterial common antigen polysaccharide is catalyzed by the product of the yiaH gene of Escherichia coli K-12. J Bacteriol 188:7542–7550. Kaltashov IA, Eyles SJ. 2005. Mass spectrometry in biophysics: Conformation and dynamics of biomolecules. Hoboken: John Wiley and Sons. Kamekawa N, Hayama K, Nakamura-Tsuruta S, Kuno A, Hirabayashi J. 2006. A combined strategy for glycan profiling: A model study 83 & HARVEY with pyridylaminated oligosaccharides. J Biochem (Tokyo) 140:337– 347. Kameyama A, Kikuchi N, Nakaya S, Ito H, Sato T, Shikanai T, Takahashi Y, Takahashi K, Narimatsu H. 2005. A Strategy for identification of oligosaccharide structures using observational multistage mass spectral library. Anal Chem 77:4719–4725. Kameyama A, Nakaya S, Ito H, Kikuchi N, Angata T, Nakamura M, Ishida HK, Narimatsu H. 2006. Strategy for simulation of CID spectra of Nlinked oligosaccharides toward glycomics. J Proteome Res 5:808–814. Kamitakahara H, Nakatsubo F. 2005. Synthesis of diblock copolymers with cellulose derivatives. 1. Model study with azidoalkyl carboxylic acid and cellobiosylamine derivative. Cellulose 12:209–219. Kamitakahara H, Nakatsubo F, Klemm D. 2006. Block co-oligomers of tri-Omethylated and unmodified cello-oligosaccharides as model compounds for methylcellulose and its dissolution/gelation behavior. Cellulose 13:375–392. Kamiya Y, Yamaguchi Y, Takahashi N, Arata Y, Kasai K-i, Ihara Y, Matsuo I, Ito Y, Yamamoto K, Kato K. 2005. Sugar-binding properties of VIP36, an intracellular animal lectin operating as a cargo receptor. J Biol Chem 280:37178–37182. Kamoda S, Ishikawa R, Kakehi K. 2006. Capillary electrophoresis with laserinduced fluorescence detection for detailed studies on N-linked oligosaccharide profile of therapeutic recombinant monoclonal antibodies. J Chromatogr A 1133:332–339. Kamoda S, Nakano M, Ishikawa R, Suzuki S, Kakehi K. 2005. Rapid and sensitive screening of N-glycans as 9-fluorenylmethyl derivatives by high-performance liquid chromatography: A method which can recover free oligosaccharides after analysis. J Proteome Res 4:146–152. Kanazawa A, Okumura S, Suzuki M. 2005. Powder-to-powder polycondensation of natural saccharides. Facile preparation of highly branched polysaccharides. Org Biomol Chem 3:1746–1750. Kanda Y, Yamane-Ohnuki N, Sakai N, Yamano K, Nakano R, Inoue M, Misaka H, Iida S, Wakitani M, Konno Y, Yano K, Shitara K, Hosoi S, Satoh M. 2006. Comparison of cell lines for stable production of fucosenegative antibodies with enhanced ADCC. Biotechnol Bioeng 94:680– 688. Kandra L, Gyémánt G, Remenyik J, Ragunath C, Ramasubbu N. 2005a. Transglycosylations catalysed by Y151M mutant of human salivary aamylase (HSA). Biologia, Bratislava 16:57–64. Kandra L, Remenyik J, Batta G, Somsák L, Gyémánt G, Park KH. 2005b. Enzymatic synthesis of a new inhibitor of a-amylases: Acarviosinylisomaltosyl-spiro-thiohydantoin. Carbohydr Res 340:1311–1317. Kanekiyo K, Lee J-B, Hayashi K, Takenaka H, Hayakawa Y, Endo S, Hayashi T. 2005. Isolation of an antiviral polysaccharide, nostoflan, from a terrestrial cyanobacterium, Nostoc flagelliforme. J Nat Prod 68:1037– 1041. Kaneko Y, Nimmerjahn F, Ravetch JV. 2006. Anti-inflammatory activity of immunoglobulin G resulting from Fc sialylation. Science 313:670– 673. Kang P, Mechref Y, Klouckova I, Novotny MV. 2005. Solid-phase permethylation of glycans for mass spectrometric analysis. Rapid Commun Mass Spectrom 19:3421–3428. Kantchev B, Chang C-C, Chang D-K. 2006. Direct Fmoc/tert-Bu solid phase synthesis of octamannosyl polylysine dendrimer-peptide conjugates. Peptide Sci 84:232–240. Kantchev EAB, Bader SJ, Parquette JR. 2005. Oligosaccharide synthesis on a soluble, hyperbranched polymer support via thioglycoside activation. Tetrahedron 61:8329–8338. Karginov VA, Nestorovich EM, Yohannes A, Robinson TM, Fahmi NE, Schmidtmann F, Hecht SM, Bezrukov SM. 2006a. Search for cyclodextrin-based inhibitors of anthrax toxins: Synthesis, structural features, and relative activities. Antimicrob Agents Chemother 50:3740–3753. 84 Karginov VA, Yohannes A, Robinson TM, Fahmi NE, Alibek K, Hecht SM. 2006b. b-Cyclodextrin derivatives that inhibit anthrax lethal toxin. Bioorg Med Chem 14:33–40. Karnoup AS, Turkelson V, Anderson WHK. 2005. O-linked glycosylation in maize-expressed human IgA1. Glycobiology 15:965–981. Kasijima Y, Yamaguchi M, Hirai N, Ohmachi T, Yoshida T. 2006. In vivo expression of UDP-N-acetylglucosamine: a-3-D-mannoside b-1,2-Nacetylglucosaminyltransferase I (GnT-1) in Aspergillus oryzae and effects on the sugar chain of a-amylase. Biosci Biotechnol Biochem 70:2662–2668. Kasuya MCZ, Ikeda M, Hashimoto K, Sato T. 2005a. Effect of anomeric linkage on the sialylation of glycosides by cells. J Carbohydr Chem 24:705–715. Kasuya MCZ, Ito A, Cusi R, Sato T, Hatanaka K. 2005b. Cellular uptake and saccharide chain elongation of ‘‘fluoro-amphiphilic’’ glycosides. Chem Lett 34:856–857. Kato K, Jeanneau C, Tarp MA, Benet-Pagès A, Lorenz-Depiereux B, Bennett EP, Mandel U, Strom TM, Clausen H. 2006. Polypeptide GalNActransferase T3 and familial tumoral calcinosis. Secretion of fibroblast growth factor 23 requires O-glycosylation. J Biol Chem 281:18370– 18377. Kato K, Yamaguchi Y, Takahashi N, Nishimura M, Iwamoto S-I, Sekiya S, Tanaka K. 2004. Discrimination of isomeric fragment ions observed in tandem mass spectra of biantennary oligosaccharides by use of selective isotope labeling. J Mass Spectrom Soc Jpn 52:284–288. Kaur D, Berg S, Dinadayala P, Gicquel B, Chatterjee D, McNeil MR, Vissa VD, Crick DC, Jackson M, Brennan PJ. 2006. Biosynthesis of mycobacterial lipoarabinomannan: Role of a branching mannosyltransferase. Proc Natl Acad Sci USA 103:13664–13669. Kawar ZS, Haslam SM, Morris HR, Dell A, Cummings RD. 2005. Novel poly-GalNAcb1-4GlcNAc (LacdiNAc) and fucosylated poly-LacdiNAc N-glycans from mammalian cells expressing b1,4-N-acetylgalactosaminyltransferase and a1,3-fucosyltransferase. J Biol Chem 280:12810–12819. Kawasaki K, Ernst RK, Miller SI. 2005. Inhibition of Salmonella enterica serovar typhimurium lipopolysaccharide deacylation by aminoarabinose membrane modification. J Bacteriol 187:2448–2457. Kay W, Petersen BO, Duus JØ, Perry MB, Vinogradov E. 2006. Characterization of the lipopolysaccharide and b-glucan of the fish pathogen Francisella victoria. FEBS J 273:3002–3013. Ke W, Whitfield DM, Brisson J-R, Enright G, Jarrell HC, Wu W. 2005. Development of specific inhibitors for heparin-binding proteins based on the cobra cardiotoxin structure: An effective synthetic strategy for rationally modified heparin-like disaccharides and a trisaccharide. Carbohydr Res 340:355–372. Keck RG, Briggs JB, Jones AJS. 2005. Oligosaccharide release and MALDITOF MS Analysis of N-Linked carbohydrate structures from glycoproteins. Methods Mol Biol 308:381–396. Keykhosravani M, Doherty-Kirby A, Zhang C, Brewer D, Goldberg HA, Hunter GK, Lajoie G. 2005. Comprehensive identification of posttranslational modifications of rat bone osteopontin by mass spectrometry. Biochemistry 44:6990–7003. Kida T, Kikuzawa A, Higashimoto H, Nakatsuji Y, Akashi M. 2005. Synthesis of novel cyclodextrin derivatives by aromatic spacer insertion and their inclusion ability. Tetrahedron 61:5763–5768. Kim J-H, Yang H, Khot V, Whitfield D, Boons G-J. 2006a. Stereoselective glycosylations using (R)- or (S)-(ethoxycarbonyl)benzyl chiral auxiliaries at C-2 of glycopyranosyl donors. Eur J Org Chem:5007–5028. Kim JH, Yang H, Park J, Boons GJ. 2005a. A general strategy for stereoselective glycosylations. J Am Chem Soc 127:12090–12097. Kim S-H, Jia W, Parreira VR, Bishop RE, Gyles CL. 2006b. Phosphoethanolamine substitution in the lipid A of Escherichia coli O157: H7 and its association with PmrC. Microbiology 152:657–666. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Kim T-K, Zhang R, Feng W, Cai J, Pierce W, Song Z-H. 2005b. Expression and characterization of human CB1 cannabinoid receptor in methylotrophic yeast Pichia pastoris. Protein Exp Purif 40:60–70. Kim Y-G, Kim S-Y, Hur Y-M, Joo H-S, Chung J, Lee D-S, Royle L, Rudd PM, Dwek RA, Harvey DJ, Kim B-G. 2006c. The identification and characterization of xenoantigenic nonhuman carbohydrate sequences in membrane proteins from porcine kidney. Proteomics 6:1133–1142. Kislinger T, Humeny A, Peich CC, Becker CM, Pischetsrieder M. 2005. Analysis of protein glycation products by MALDI-TOF/MS. Ann NY Acad Sci 1043:249–259. Kitajima T, Chiba Y, Jigami Y. 2006. Saccharomyces cerevisiae a1,6mannosyltransferase has a catalytic potential to transfer a second mannose molecule. FEBS J 273:5074–5085. Kiyohara M, Hama Y, Yamaguchi K, Ito M. 2006. Structure of b-1,3xylooligosaccharides generated from Caulerpa racemosa var. laetevirens b-1,3-xylan by the action of b-1,3-xylanase. J Biochem (Tokyo) 140:369–373. Kiyonaka S, Shinkai S, Hamachi I. 2003. Combinatorial library of low molecular-weight organo- and hydrogelators based on glycosylated amino acid derivatives by solid-phase synthesis. Chem Eur J 9:976– 983. Knochenmuss R. 2006. Ion formation mechanisms in UV-MALDI. Analyst 131:966–986. Knochenmuss R, McCombie G, Faderl M. 2006. Ion yields of thin MALDI samples: Dependence on matrix and metal substrate and implications for models. J Phys Chem A 110:12728–12733. Kobayashi A, Kuwata H, Kohri M, Izumi R. 2006a. A bacterial chitinase acts as catalyst for synthesis of the N-linked oligosaccharide core trisaccharide by employing a sugar oxazoline substrate. J Carbohydr Chem 25:533–541. Kobayashi S, Makino A, Matsumoto H, Kunii S, Ohmae M, Kiyosada T, Makiguchi K, Matsumoto A, Horie M, Shoda S-I. 2006b. Enzymatic polymerization to novel polysaccharides having a glucose-N-acetylglucosamine repeating unit, a cellulose-chitin hybrid polysaccharide. Biomacromolecules 7:1644–1656. Kobayashi S, Makino A, Tachibana N, Ohmae M. 2006c. Chitinase-catalyzed synthesis of a chitin-xylan hybrid polymer: A novel water-soluble b(14) polysaccharide having an N-acetylglucosamine xylose repeating unit. Macromol Mol Commun 27:781–786. Kobayashi S, Ohmae M. 2006. Enzymatic polymerization of polysaccharides. Adv Polym Sci 194:159–210. Koel M. 2005. Ionic liquids in chemical analysis. Crit Rev Anal Chem 35:177–192. Kolarich D, Altmann F, Sunderasan E. 2006. Structural analysis of the glycoprotein allergen Hev b 4 from natural rubber latex by mass spectrometry. Biochim Biophys Acta 1760:715–720. Kolarich D, Léonard R, Hemmer W, Altmann F. 2005. The N-glycans of yellow jacket venom hyaluronidases and the protein sequence of its major isoform in Vespula vulgaris. FEBS J 272:5182–5190. Kolarich D, Weber A, Turecek PL, Schwarz H-P, Altmann F. 2006. Comprehensive glyco-proteomic analysis of human a1-antitrypsin and its charge isoforms. Proteomics 6:3369–3380. Kondo A, Li W, Nakagawa T, Nakano M, Koyama N, Wang X, Gu J, Miyoshi E, Taniguchi N. 2006. From glycomics to functional glycomics of sugar chains: Identification of target proteins with functional changes using gene targeting mice and knock down cells of FUT8 as examples. Biochim Biophys Acta 1764:1881–1889. Kotake T, Dina S, Konishi T, Kaneko S, Igarashi K, Samejima M, Watanabe Y, Kimura K, Tsumuraya Y. 2005. Molecular cloning of a b-galactosidase from radish that specifically hydrolyzes b-(1-3)- and b-(1-6)-galactosyl residues of arabinogalactan protein. Plant Physiol 138:1563–1576. Kovacevic S, Anderson D, Morita YS, Patterson J, Haites R, McMillan BNI, Coppel R, McConville MJ, Billman-Jacobe H. 2006. Identification of a Mass Spectrometry Reviews DOI 10.1002/mas & novel protein with a role in lipoarabinomannan biosynthesis in mycobacteria. J Biol Chem 281:9011–9017. Kovácik V, Bekesová S, Pätoprsty V, Rehulka P, Chmelı́k J, Kovác P. 2006. Positive-ion fragmentation in matrix-assisted laser desorption/ionization tandem time-of-flight mass spectrometry of synthetic analogues of the O-specific polysaccharide of Vibrio cholerae O:1. Eur J Mass Spectrom 12:247–252. Kovalchuk SN, Sundukova EV, Kusaykin MI, Guzev KV, Anastiuk SD, Likhatskaya GN, Trifonov EV, Nurminski EA, Kozhemyako VB, Zvyagintseva TN, Rasskazov VA. 2006. Purification, cDNA cloning and homology modeling of endo-1,3-b-D-glucanase from scallop Mizuhopecten yessoensis. Comp Biochem Physiol B 143:473–485. Kozma K, Keusch JJ, Hegemann B, Luther KB, Klein D, Hess D, Haltiwanger RS, Hofsteenge J. 2006. Identification and characterization of a b1,3glucosyltransferase that synthesizes the Glc-b1,3-Fuc disaccharide on thrombospondin type 1 repeats. J Biol Chem 281:36742–36751. Krief S, Thoison O, Sévenet T, Wrangham RW, Lavaud C. 2005. Triterpenoid saponin anthranilates from Albizia grandibracteata leaves ingested by primates in Uganda. J Nat Prod 68:897–903. Kröger L, Scudlo A, Thiem J. 2006. Subsequent enzymatic galactosylation and sialylation towards sialylated Thomsen-Friedenreich antigen components. Adv Synth Catal 348:1217–1227. Kubler-Kielb J, Liu T-Y, Mocca C, Majadly F, Robbins JB, Schneerson R. 2006. Additional conjugation methods and immunogenicity of Bacillus anthracis poly-g-D-glutamic acid-protein conjugates. Infect Immun 74:4744–4749. Kubler-Kielb J, Pozsgay V. 2005. A new method for conjugation of carbohydrates to proteins using an aminooxy-thiol heterobifunctional linker. J Org Chem 70:6987–6990. Kübler-Kielb J, Vinogradov E, Garcı́a Fernández JM, Szostko B, Zwiefka A, Gamian A. 2006. Structure and serological analysis of the Hafnia alvei 481-L O-specific polysaccharide containing phosphate in the backbone chain. Carbohydr Res 341:2980–2985. Kuhn J, Schnölzer M, Schön S, Müller S, Prante C, Götting C, Kleesiek K. 2005. Xylosyltransferase I acceptor properties of fibroblast growth factor and its fragment bFGF (1-24). Biochem Biophys Res Commun 333:156–166. Kumar ABV, Varadaraj MC, Gowda LR, Tharanathan RN. 2005. Characterization of chito-oligosaccharides prepared by chitosanolysis with the aid of papain and pronase, and their bactericidal action against Bacillus cereus and Escherichia coli. Biochem J 391:167–175. Kumar NS, Pinto BM. 2005. Synthesis of D-lyxitol and D-ribitol analogues of the naturally occurring glycosidase inhibitor salacinol. Carbohydr Res 340:2612–2619. Kumar NS, Pinto BM. 2006. Synthesis of thioswainsonine as a potential glycosidase inhibitor. Carbohydr Res 341:1685–1691. Kurakake M, Sumida T, Masuda D, Oonishi S, Komaki T. 2006. Production of galacto-manno-oligosaccharides from guar gum by b-mannanase from Penicillium oxalicum SO. J Agric Food Chem 54:7885–7889. Kurogochi M, Nishimura S-I. 2004. Structural characterization of Nglycopeptides by matrix-dependent selective fragmentation of MALDI-TOF/TOF tandem mass spectrometry. Anal Chem 76:6097– 6101. Küster B, Wheeler SF, Hunter AP, Dwek RA, Harvey DJ. 1997. Sequencing of N-linked oligosaccharides directly from protein gels: In-gel deglycosylation followed by matrix-assisted laser desorption/ionization mass spectrometry and normal-phase high performance liquid chromatography. Anal Biochem 250:82–101. Kvaerno L, Werder M, Hauser H, Carreira EM. 2005. Carbohydrate sulfonyl chlorides for simple, convenient access to glycoconjugates. Org Lett 7:1145–1148. Kwan EM, Boraston AB, McLean BW, Kilburn DG, Warren RAJ. 2005. Nglycosidase-carbohydrate-binding module fusion proteins as immobi- 85 & HARVEY lized enzymes for protein deglycosylation. Protein Eng Des Sel 18:497–501. Kwon Y-U, Soucy RL, Snyder DA, Seeberger PH. 2005. Assembly of a series of malarial glycosylphosphatidylinositol anchor oligosaccharides. Chem Eur J 11:2493–2504. Kyogashima M, Tamiya-Koizumi K, Ehara T, Li G, Hu R, Hara A, Aoyama T, Kannagi R. 2006. Rapid demonstration of diversity of sulfatide molecular species from biological materials by MALDI-TOF MS. Glycobiology 16:719–728. Lam SN, Gervay-Hague J. 2005a. Glycal scavenging in the synthesis of disaccharides using mannosyl iodide donors. J Org Chem 70:2387– 2390. Lam SN, Gervay-Hague J. 2005b. Efficient synthesis of Man2, Man3, and Man5 oligosaccharides, using mannosyl iodide donors. J Org Chem 70:8772–8779. Lamidi M, Ollivier E, Mahiou V, Faure R, Debrauwer L, Ekekang LN, Balansard G. 2005. Gluco-indole alkaloids from the bark of Nauclea diderrichii. 1H and 13C NMR assignments of 3-5-tetrahydrodeoxycordifoline lactam and cadambine acid. Magn Reson Chem 43:427–429. Lancaster KS, An HJ, Li B, Lebrilla CB. 2006. Interrogation of N-linked oligosaccharides using infrared multiphoton dissociation in FT-ICR mass spectrometry. Anal Chem 78:4990–4997. Lapadula AJ, Hatcher PJ, Hanneman AJ, Ashline DJ, Zhang H, Reinhold VN. 2005. Congruent strategies for carbohydrate sequencing. 3. OSCAR: An algorithm for assigning oligosaccharide topology from MSn data. Anal Chem 77:6271–6279. Lapolla A, Fedele D, Reitano R, Bonfante L, Guizzo M, Seraglia R, Tubaro M, Traldi P. 2005a. Mass spectrometric study of in vivo production of advanced glycation end-products/peptides. J Mass Spectrom 40:969– 972. Lapolla A, Fedele D, Reitano R, Bonfante L, Pastori G, Seraglia R, Tubaro M, Traldi P. 2005b. Advanced glycation end products/peptides: An in vivo investigation. Ann NY Acad Sci 1043:267–275. Lapolla A, Fedele D, Seraglia R, Traldi P. 2006. The role of mass spectrometry in the study of non-enzymatic protein glycation in diabetes: An update. Mass Spectrom Rev 25:775–797. Lapolla A, Fedele D, Traldi P. 2005. Glyco-oxidation in diabetes and related diseases. Clin Chim Acta 357:236–250. Lapolla A, Traldi P, Fedele D. 2005. Importance of measuring products of non-enzymatic glycation of proteins. Clin Biochem 38:103–115. Lapolla A, Tubaro M, Fedele D, Reitano R, Arico NC, Ragazzi E, Seraglia R, Vogliardi S, Traldi P. 2005c. A matrix-assisted laser desorption/ ionization mass spectrometry study of the non-enzymatic glycation products of human globins in diabetes. Rapid Commun Mass Spectrom 19:162–168. Laremore TN, Murugesan S, Park T-J, Avci FY, Zagorevski DV, Linhardt RJ. 2006. Matrix-assisted laser desorption/ionization mass spectrometric analysis of uncomplexed highly sulfated oligosaccharides using ionic liquid matrices. Anal Chem 78:1774–1779. Larsen K, Thygesen MB, Guillaumie F, Willats WGT, Jensen KJ. 2006. Solid-phase chemical tools for glycobiology. Carbohydr Res 341: 1209–1234. Larsen MR, Højrup P, Roepstorff P. 2005. Characterization of gel-separated glycoproteins using two-step proteolytic digestion combined with sequential microcolumns and mass spectrometry. Mol Cell Proteomics 4:107–119. Larsson EA, Sjöberg M, Widmalm G. 2005. Synthesis of oligosaccharides related to the repeating unit of the capsular polysaccharide from Streptococcus pneumoniae type 37. Carbohydr Res 340:7–13. Laštovicková M, Chmelı́k J. 2006. Simple and fast method for recognition of reducing and nonreducing neutral carbohydrates by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. J Agric Food Chem 54:5092–5097. 86 Lattová E, Kapková P, Krokhin O, Perreault H. 2006. Method for investigation of oligosaccharides from glycopeptides: Direct determination of glycosylation sites in proteins. Anal Chem 78:2977–2984. Lattová E, Snovida S, Perreault H, Krokhin O. 2005. Influence of the labeling group on ionization and fragmentation of carbohydrates in mass spectrometry. J Am Soc Mass Spectrom 16:683–696. Laville I, Pigaglio S, Blais J-C, Doz F, Loock B, Maillard P, Grierson DS, Blais J. 2006. Photodynamic efficiency of diethylene glycol-linked glycoconjugated porphyrins in human retinoblastoma cells. J Med Chem 49:2558–2567. Lazarevic D, Thiem J. 2006. Artificial N-functionalized UDP-glucosamine analogues as modified substrates for N-acetylglucosaminyl transferases. Carbohydr Res 341:569–576. Le Coq J, An H-J, Lebrilla C, Viola RE. 2006. Characterization of human aspartoacylase: The brain enzyme responsible for Canavan disease. Biochemistry 45:5878–5884. Le Quéré AJ-L, Deakin WJ, Schmeisser C, Carlson RW, Streit WR, Broughton WJ, Forsberg LS. 2006. Structural characterization of a Kantigen capsular polysaccharide essential for normal symbiotic infection in Rhizobium sp. Detection of the rkpMNO locus prevents synthesis of 5,7-diacetamido-3,5,7,9-tetradeoxy-non-ulosonic acid. J Biol Chem 281:28981–28992. Lee A, Wu S-W, Scherman MS, Torrelles JB, Chatterjee D, McNeil MR, Khoo K-H. 2006a. Sequencing of oligoarabinosyl units released from mycobacterial arabinogalactan by endogenous arabinanase: Identification of distinctive and novel structural motifs. Biochemistry 45:15817– 15828. Lee B-S, Krishnanchettiar S, Lateef SS, Gupta S. 2005a. Characterization of oligosaccharide moieties of glycopeptides by microwave-assisted partial acid hydrolysis and mass spectrometry. Rapid Commun Mass Spectrom 19:1545–1550. Lee B-S, Krishnanchettiar S, Lateef SS, Lateef NS, Gupta S. 2005b. Characterization of oligosaccharide moieties of intact glycoproteins by microwave-assisted partial acid hydrolysis and mass spectrometry. Rapid Commun Mass Spectrom 19:2629–2635. Lee B-S, Krisnanchettiar S, Lateef SS, Lateef NS, Gupta S. 2005c. Oligosaccharide analyses of glycopeptides of horseradish peroxidase by thermal-assisted partial acid hydrolysis and mass spectrometry. Carbohydr Res 340:1859–1865. Lee D-W, Baney RH. 2004. Oligochitosan derivatives bearing electrondeficient aromatic rings for adsorption of amitriptyline: Implications for drug detoxification. Biomacromolecules 5:1310–1315. Lee HJ, Howell SK, Sanford RJ, Beisswenger PJ. 2005d. Methylglyoxal can modify GAPDH activity and structure. Ann NY Acad Sci 1043:135– 145. Lee H-S, Wolfert MA, Zhang Y, Boons G-J. 2006b. The 2-aminogluconate isomer of Rhizobium sin-1 lipid A can antagonize TNF-production induced by enteric LPS. ChemBioChem 7:140–148. Lee JH, Kim Y, Ha MY, Lee EK, Choo J. 2005e. Immobilization of aminophenylboronic acid on magnetic beads for the direct determination of glycoproteins by matrix assisted laser desorption ionization mass spectrometry. J Am Soc Mass Spectrom 16:1456–1460. Lee J-H, Shim JS, Lee JS, Kim M-K, Chung M-S, Kim KH. 2006c. Pectin-like acidic polysaccharide from Panax ginseng with selective antiadhesive activity against pathogenic bacteria. Carbohydr Res 341:1154–1163. Lee JJ, Dissanayake S, Panico M, Morris HR, Dell A, Haslam SM. 2005f. Mass spectrometric characterisation of Taenia crassiceps metacestode N-glycans. Mol Biochem Parasitol 143:245–249. Lee YJ, Lee K, Jung EH, Jeon HB, Kim KS. 2005g. Acceptor-dependent stereoselective glycosylation: 20 -CB glycoside-mediated direct b-Darabinofuranosylation and efficient synthesis of the octaarabinofuranoside in mycobacterial cell wall. Org Lett 7:3263–3266. Leir S-H, Parry S, Palmai-Pallag T, Evans J, Morris HR, Dell A, Harris A. 2005. Mucin glycosylation and sulphation in airway epithelial cells is Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES not influenced by cystic fibrosis transmembrane conductance regulator expression. Am J Respir Cell Mol Biol 32:453–461. Léonard R, Lhernould S, Carlué M, Fleurat P, Maftah A, Costa G. 2005. Biochemical characterization of Silene alba a4-fucosyltransferase and Lewis a products. Glycoconj J 22:71–78. Leonard R, Petersen BO, Himly M, Kaar W, Wopfner N, Kolarich D, van-Ree R, Ebner C, Duus JO, Ferreira F, Altmann F. 2005. Two novel types of O-glycans on the mugwort pollen allergen Art v 1 and their role in antibody binding. J Biol Chem 280:7932–7940. Leonard R, Rendic D, Rabouille C, Wilson IB, Preat T, Altmann F. 2006. The Drosophila fused lobes gene encodes an N-acetylglucosaminidase involved in N-glycan processing. J Biol Chem 281:4867–4875. Leone S, Molinaro A, Alfieri F, Cafaro V, Lanzetta R, Di Donato A, Parrilli M. 2006a. The biofilm matrix of Pseudomonas sp. OX1 grown on phenol is mainly constituted by alginate oligosaccharides. Carbohydr Res 341:2456–2461. Leone S, Molinaro A, Pessione E, Mazzoli R, Giunta C, Sturiale L, Garozzo D, Lanzetta R, Parrilli M. 2006b. Structural elucidation of the core-lipid A backbone from the lipopolysaccharide of Acinetobacter radioresistens S13, an organic solvent tolerant Gram-negative bacterium. Carbohydr Res 341:582–590. Leppänen A, Stowell SR, Blixt O, Cummings RD. 2005. Dimeric galectin-1 binds with high affinity to a2,3-sialylated and non-sialylated terminal N-acetyllactosamine units on surface-bound extended glycans. J Biol Chem 280:5549–5562. Levery SB. 2005. Glycosphingolipid structural analysis and glycosphingolipidomics. Methods Enzymol 405:300–369. Levina EV, Kalinovsky AI, Levin VS. 2006. New steroid glycosides from the starfish Fromia milleporella. Russ J Bioorg Chem 32:84–88. Levina EV, Kalinovsky AI, Stonik VA, Dmiternok PS, Andriyashchenko PV. 2005. Steroid compounds from Far Eastern starfishes Henricia aspera and H. tumida. Russ J Bioorg Chem 31:467–474. Lewandrowski U, Resemann A, Sickmann A. 2005. Laser-induced dissociation/high-energy collision-induced dissociation fragmentation using MALDI-TOF/TOF-MS instrumentation for the analysis of neutral and acidic oligosaccharides. Anal Chem 77:3274–3283. Li A, Kong F. 2005a. Concise syntheses of arabinogalactans with b-(1-6)linked galactopyranose backbones and a-(1-3)- and a-(1-2)-linked arabinofuranose side chains. Bioorg Med Chem 13:839–853. Li A, Kong F. 2005b. Syntheses of b-(1-6)-branched b-(1-3)-linked Dgalactans that exist in the rhizomes of Atractylodes lancea DC. Carbohydr Res 340:1949–1962. Li D, Roh S-A, Shim J-H, Mikami B, Baik M-Y, Park C-S, Park K-H. 2005a. Glycosylation of genistin into soluble inclusion complex form of cyclic glucans by enzymatic modification. J Agric Food Chem 53:6516–6524. Li H, Sethuraman N, Stadheim TA, Zha D, Prinz B, Ballew N, Bobrowicz P, Choi B-K, Cook WJ, Cukan M, Houston-Cummings NR, Davidson R, Gong B, Hamilton SR, Hoopes JP, Jiang Y, Kim N, Mansfield R, Nett JH, Rios S, Strawbridge R, Wildt S, Gerngross TU. 2006. Optimization of humanized IgGs in glycoengineered Pichia pastoris. Nat Biotechnol 24:210–215. Li J, Du Y, Liang H. 2006. Low molecular weight water-soluble chitosans: Preparation with the aid of cellulase, characterization, and solubility. J Appl Polym Sci 102:1098–1105. Li J, Du Y, Yang J, Feng T, Li A, Chen P. 2005b. Preparation and characterisation of low molecular weight chitosan and chito-oligomers by a commercial enzyme. Polym Degrad Stab 87:441–448. Li JS, Li J. 2005. Characterization of N-linked oligosaccharides in chorion peroxidase of Aedes aegypti mosquito. Protein Sci 14:2370– 2386. Li Y, Wei G, Yu B. 2006. Aryl C-glycosylation of phenols with glycosyl trifluoroacetimidates. Carbohydr Res 341:2717–2722. Mass Spectrometry Reviews DOI 10.1002/mas & Liang H, Tong W-Y, Zhao Y-Y, Cui J-R, Tu G-Z. 2005. An antitumor compound julibroside J28 from Albizia julibrissin. Bioorg Med Chem Lett 15:4493–4495. Liberek B, Melcer A, Osuch A, Wakiec R, Milewski S, Wisniewsk A. 2005. N-alkyl derivatives of 2-amino-2-deoxy-D-glucose. Carbohydr Res 340:1876–1884. Lin C-C, Huang KT, Lin C-C. 2005. N-trifluoroacetyl sialyl phosphite donors for the synthesis of a(2-9) oligosialic acids. Org Lett 7:4169–4172. Liou H-L, Dixit SS, Xu S, Tint GS, Stock AM, Lobel P. 2006. NPC2, the protein deficient in Niemann-Pick C2 disease, consists of multiple glycoforms that bind a variety of sterols. J Biol Chem 281:36710– 36723. Liparoti V, Molinaro A, Sturiale L, Garozzo D, Nazarenko EL, Gorshkova RP, Ivanova EP, Shevcenko LS, Lanzetta R, Parrilli M. 2006. Structural analysis of the deep rough lipopolysaccharide from Gram negative bacterium Alteromonas macleodii ATCC 27126T: The first finding of bKdo in the inner core of lipopolysaccharides. Eur J Org Chem:4710– 4716. Liu H, Geng M, Xin X, Li F, Zhang Z, Li J, Ding J. 2005. Multiple and multivalent interactions of novel anti-AIDS drug candidates, sulfated polymannuronate (SPMG)-derived oligosaccharides, with gp120 and their anti-HIV activities. Glycobiology 15:501–510. Liu J, Jönsson LÅ, Jiang G. 2005. Application of ionic liquids in analytical chemistry. Trends Anal Chem 24:20–27. Liu S, Ben RN. 2005. C-linked galactosyl serine AFGP analogues as potent recrystallization inhibitors. Org Lett 7:2385–2388. Liu X, Kwon Y-U, Seeberger PH. 2005. Convergent synthesis of a fully lipidated glycosylphosphatidylinositol anchor of Plasmodium falciparum. J Am Chem Soc 127:5004–5005. Liu X, McNally DJ, Nothaft H, Szymanski CM, Brisson J-R, Li J. 2006a. Mass spectrometry-based glycomics strategy for exploring N-linked glycosylation in eukaryotes and bacteria. Anal Chem 78:6081–6087. Liu X, Stocker BL, Seeberger PH. 2006. Total synthesis of phosphatidylinositol mannosides of Mycobacterium tuberculosis. J Am Chem Soc 128:3638–3648. Liu Y, Ding N, Xiao H, Li Y. 2006b. Efficient syntheses of a series of glycosphingolipids with 1,2-trans-glycosidic linkages. J Carbohydr Chem 25:471–489. López O, Maza S, Maya I, Fuentes J, Fernández-Bolaños JG. 2005. New synthetic approaches to sugar ureas. Access to ureido-b-cyclodextrins. Tetrahedron 61:9058–9069. López-Prados J, Cuevas F, Reichardt N-C, de Paz J-L, Morales EQ, Martı́nLomas M. 2005. Design and synthesis of inositolphosphoglycan putative insulin mediators. Org Biomol Chem 3:764–786. López-Prados J, Martı́n-Lomas M. 2005. Inositolphosphoglycan mediators: An effective synthesis of the conserved linear GPI anchor structure. J Carbohydr Chem 24:393–414. Lowe JP, Stuckey DJ, Awan FR, Jeyakumar M, Neville DCA, Platt FM, Griffin JL, Styles P, Blamire AM, Sibson NR. 2005. MRS reveals additional hexose N-acetyl resonances in the brain of a mouse model for Sandhoff disease. NMR Biomed 18:517–526. Lu J, Fraser-Reid B, Gowda C. 2005. A strategy for ready preparation of glycolipids for multivalent presentation. Org Lett 7:3841–3843. Lu W, Leimkuhler C, Gatto GJJ, Kruger RG, Oberthür M, Kahne D, Walsh CT. 2005. AknT is an activating protein for the glycosyltransferase AknS in L-aminodeoxysugar transfer to the aglycone of aclacinomycin A. Chem Biol 12:527–534. Lucka L, Fernando M, Grunow D, Kannicht C, Horst AK, Nollau P, Wagerer C. 2005. Identification of Lewis x structures of the cell adhesion molecule CEACAM1 from human granulocytes. Glycobiology 15:87– 100. Lukasiewicz J, Dzieciatkowska M, Niedziela T, Jachymek W, Augustyniuk A, Kenne L, Lugowski C. 2006a. Complete lipopolysaccharide of Plesiomonas shigelloides O74: H5 (strain CNCTC 144/92). 2. Lipid A, 87 & HARVEY its structural variability, the linkage to the core oligosaccharide, and the biological activity of the lipopolysaccharide. Biochemistry 45:10434– 10447. Lukasiewicz J, Niedziela T, Jachymek W, Kenne L, Lugowski C. 2006b. Structure of the lipid A-inner core region and biological activity of Plesiomonas shigelloides O54 (strain CNCTC 113/92) lipopolysaccharide. Glycobiology 16:538–550. Luo Y, Ye S, Kan M, McKeehan WL. 2006a. Structural specificity in a FGF7affinity purified heparin octasaccharide required for formation of a complex with FGF7 and FGFR2IIIb. J Cell Biochem 97:1241–1258. Luo Y, Ye S, Kan M, McKeehan WL. 2006b. Control of fibroblast growth factor (FGF) 7- and FGF1-induced mitogenesis and downstream signaling by distinct heparin octasaccharide motifs. J Biol Chem 281:21052–21061. Lütteke T, Bohne-Lang A, Loss A, Goetz T, Frank M, von der Lieth C-W. 2006. GLYCOSCIENCES.de: An Internet portal to support glycomics and glycobiology research. Glycobiology 16:71R–81R. Lysek R, Schütz C, Voge P. 2005. Total asymmetric synthesis of ()conduramine B-1 and of its enantiomer. N-Benzyl derivatives of conduramine B-1 are b-glucosidase inhibitors. Bioorg Med Chem Lett 15:3071–3075. Macrae JI, Acosta-Serrano A, Morrice NA, Mehlert A, Ferguson MA. 2005. Structural characterization of NETNES, a novel glycoconjugate in Trypanosoma cruzi epimastigotes. J Biol Chem 280:12201–12211. Madsen AS, Hrdlicka PJ, Kumar TS, Wengel J. 2006. Synthesis, nucleic acid hybridization properties and molecular modelling studies of conformationally restricted 30 -O,40 -C-methylene-linked a-L-ribonucleotides. Carbohydr Res 341:1398–1407. Maeda K, Mochizuki H, Watanabe M, Yashima E. 2006. Switching of macromolecular helicity of optically active poly(phenylacetylene)s bearing cyclodextrin pendants induced by various external stimuli. JAm Chem Soc 128:7639–7650. Maemura M, Ohgaki A, Nakahara Y, Hojo H, Nakahara Y. 2005. Solid-phase synthesis of core 8 O-glycan-linked MUC5AC glycopeptide. Biosci Biotechnol Biochem 69:1575–1583. Maes E, Garénaux E, Strecker G, Leroy Y, Wieruszeski J-M, Brassart C, Guérardel Y. 2005. Major O-glycans from the nest of Vespula germanica contain phospho-ethanolamine. Carbohydr Res 340:1852– 1858. Maillard LT, Guérineau V, Badet-Denisot M-A, Badet B, Laprévote O, Durand P. 2006. Monitoring enzyme-catalyzed production of glucosamine-6P by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry: A new enzymatic assay for glucosamine-6P synthase. Rapid Commun Mass Spectrom 20:666–672. Majcherczyk PA, McKenna T, Moreillon P, Vaudaux P. 2006. The discriminatory power of MALDI-TOF mass spectrometry to differentiate between isogenic teicoplanin-susceptible and teicoplaninresistant strains of methicillin-resistant Staphylococcus aureus. FEMS Microbiol Lett 255:233–239. Majumdar G, Harrington A, Hungerford J, Martinez-Hernandez A, Gerling IC, Raghow R, Solomon S. 2006. Insulin dynamically regulates calmodulin gene expression by sequential O-glycosylation and phosphorylation of sp1 and its subcellular compartmentalization in liver cells. J Biol Chem 281:3642–3650. Makarieva TN, Denisenko VA, Dmitrenok PS, Guzii AG, Santalova EA, Stonik VA, MacMillan JB, Molinski TF. 2005a. Oceanalin A, a hybrid a,o-bifunctionalized sphingoid tetrahydroisoquinoline b-glycoside from the marine sponge Oceanapia sp. Org Lett 7:2897–2900. Makarieva TN, Guzii AG, Denisenko VA, Dmitrenok PS, Santalova EA, Pokanevich EV, Molinski TF, Stonik VA. 2005b. Rhizochalin A, a novel two-headed sphingolipid from the sponge Rhizochalina incrustata. J Nat Prod 68:255–257. Makimura Y, Watanabe S, Suzuki T, Suzuki Y, Ishida H, Kiso M, Katayama T, Kumagai H, Yamamoto K. 2006. Chemoenzymatic synthesis and 88 application of a sialoglycopolymer with a chitosan backbone as a potent inhibitor of human influenza virus hemagglutination. Carbohydr Res 341:1803–1808. Makino A, Kurosaki K, Ohmae M, Kobayashi S. 2006. Chitinase-catalyzed synthesis of alternatingly N-deacetylated chitin: A chitin-chitosan hybrid polysaccharide. Biomacromolecules 7:950–957. Makino A, Ohmae M, Kobayashi S. 2006. Synthesis of fluorinated chitin derivatives via enzymatic polymerization. Macromol Biosci 6:862– 872. Makishima S, Nozaki K, Mizuno M, Netsu E, Shinji K, Shibayama T, Kanda T, Amano Y. 2006. Recovery of soluble sugars from waste medium for enokitake (Flammulina velutipes) mushroom cultivation with hydrothermal reaction and enzyme digestion. J Appl Glycosci 53:261– 266. Makita H, Nakahara Y, Fukui H, Miyanori Y, Katahira M, Srki H, Takeda M, Koizumi J-I. 2006. Identification of 2-(cysteinyl)amido-2-deoxy-Dgalacturonic acid residue from the sheath of Leptothrix cholodnii. Biosci Biotechnol Biochem 70:1265–1268. Maljaars CEP, Halkes KM, de Oude WL, Haseley SR, Upton PJ, McDonnell MB, Kamerling JP. 2006. Affinity determination of Ricinus communis agglutinin ligands identified from combinatorial O- and S-N-glycopeptide libraries. J Comb Chem 8:812–819. Maljaars CEP, Halkes KM, de Oude WL, van der Poel S, Pijnenburg NJM, Kamerling JP. 2005. Preparation of S- and N-linked glycosylated amino acid building blocks for solid-phase glycopeptide library synthesis. J Carbohydr Chem 24:353–367. Mandal D, Panda N, Kumar S, Banerjee S, Mandal NB, Sahu NP. 2006. A triterpenoid saponin possessing antileishmanial activity from the leaves of Careya arborea. Phytochemistry 67:183–190. Mandato C, Brive L, Miura Y, Davis JA, Di-Cosmo N, Lucariello S, Pagliardini S, Seo NS, Parenti G, Vecchione R, Freeze HH, Vajro P. 2006. Cryptogenic liver disease in four children: A novel congenital disorder of glycosylation. Pediatr Res 59:293–298. Mangold SL, Morgan JR, Strohmeyer GC, Gronenborn AM, Cloninger MJ. 2005. Cyanovirin-N binding to Man1-2Man functionalized dendrimers. Org Biomol Chem 3:2354–2358. Manimala JC, Li Z, Jain A, VedBrat S, Gildersleeve JC. 2005. Carbohydrate array analysis of anti-Tn antibodies and lectins reveals unexpected specificities: Implications for diagnostic and vaccine development. ChemBioChem 6:2229–2241. Manzoni L, Castelli R. 2006. Froc: A new fluorous protective group for peptide and oligosaccharide synthesis. Org Lett 8:955–957. Mares J, Müller JU, Skirgailiene A, Neumoin A, Bewley CA, Schmidt RR, Zerbe O. 2006. A model for cell-surface-exposed carbohydrate moieties suitable for structural studies by NMR spectroscopy. ChemBioChem 7:1764–1773. Mariappan M, Preusser-Kunze A, Balleininger M, Eiselt N, Schmidt B, Gande SL, Wenzel D, Dierks T, von Figura K. 2005. Expression, localization, structural, and functional characterization of pFGE, the paralog of the Ca-formylglycine-generating enzyme. J Biol Chem 280:15173–15179. Marmuse L, Nepogodiev SA, Field RA. 2005a. Exploiting an aromatic aglycone as a reporter of glycosylation stereochemistry in the synthesis of 1,6-linked maltooligosaccharides. Tetrahedron Asym 16:477–485. Marmuse L, Nepogodiev SA, Field RA. 2005b. ‘‘Click’’ chemistry en route to pseudo-starch. Org Biomol Chem 3:2225–2227. Masand G, Hanif K, Sen S, Ahsan A, Maiti S, Pasha S. 2006. Synthesis, conformational and pharmacological studies of glycosylated chimeric peptides of Met-enkephalin and FMRFa. Brain Res Bull 68:329– 334. Maslen S, Sadowski P, Adam A, Lilley K, Stephens E. 2006. Differentiation of isomeric N-glycan structures by normal-phase liquid chromatography-MALDI-TOF/TOF tandem mass spectrometry. Anal Chem 78:8491–8498. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Matsubara H, Kabuto S, Nakahara N, Ogawa T, Muramoto K, Jimbo M, Kamiya H. 2005a. Structure and possible function of N-glycans of an invertebrate C-type lectin from the acorn barnacle Megabalanus rosa. Fisheries Sci 71:931–940. Matsubara N, Oiwa K, Hohsaka T, Sadamoto R, Niikura K, Fukuhara N, Takimoto A, Kondo H, Nishimura S-I. 2005b. Molecular design of glycoprotein mimetics: Glycoblotting by engineered proteins with an oxylamino-functionalized amino acid residue. Chem Eur J 11:6974– 6981. Matsuo I, Kashiwagi T, Totani K, Ito Y. 2005. First chemical synthesis of triglucosylated tetradecasaccharide (Glc3Man9GlcNAc2), a common precursor of asparagine-linked oligosaccharides. Tetrahedron Lett 46:4197–4200. Matsuo I, Totani K, Tatami A, Ito Y. 2006. Comprehensive synthesis of ER related high-mannose-type sugar chains by convergent strategy. Tetrahedron 62:8262–8277. Matsuoka K, Terabatake M, Esumi Y, Hatano K, Terunuma D, Kuzuhara H. 2006. Carbosilane dendrimers bearing globotriaoses: Construction of a series of carbosilane dendrimers bearing globotriaoses. Biomacromolecules 7:2284–2290. Matsushita T, Hinou H, Fumoto M, Kurogochi M, Fujitani N, Shimizu H, Nishimura S-I. 2006. Construction of highly glycosylated mucin-type glycopeptides based on microwave-assisted solid-phase syntheses and enzymatic modifications. J Org Chem 71:3051–3063. Mazumder S, Lerouge P, Loutelier-Bourhis C, Driouich A, Ray B. 2005. Structural characterisation of hemicellulosic polysaccharides from Benincasa hispida using specific enzyme hydrolysis, ion exchange chromatography and MALDI-TOF mass spectroscopy. Carbohydr Polym 59:231-238. Mazzaglia A, Forde D, Garozzo D, Malvagna P, Ravoo BJ, Darcy R. 2004. Multivalent binding of galactosylated cyclodextrin vesicles to lectin. Org Biomol Chem 2:957–960. Mechref Y, Kang P, Novotny MV. 2006. Differentiating structural isomers of sialylated glycans by matrix-assisted laser desorption/ionization timeof-flight/time-of-flight tandem mass spectrometry. Rapid Commun Mass Spectrom 20:1381–1389. Mechref Y, Muzikar J, Novotny MV. 2005. Comprehensive assessment of Nglycans derived from a murine monoclonal antibody: A case for multimethodological approach. Electrophoresis 26:2034–2046. Mechref Y, Novotny MV. 2006. Miniaturized separation techniques in glycomic investigations. J Chromatogr B 841:65–78. Medzihradszky KF. 2005. Characterization of protein N-glycosylation. Methods Enzymol 405:116–138. Mehlmann M, Garvin AM, Steinwand M, Gauglitz G. 2005. Reflectometric interference spectroscopy combined with MALDI–TOF mass spectrometry to determine quantitative and qualitative binding of mixtures of vancomycin derivatives. Anal Bioanal Chem 382:1942–1948. Mehra R, Kelly P. 2006. Milk oligosaccharides: Structural and technological aspects. Int Dairy J 16:1334–1340. Mehta AS, Saile E, Zhong W, Buskas T, Carlson R, Kannenberg E, Reed Y, Quinn CP, Boons G-J. 2006. Synthesis and antigenic analysis of the BclA glycoprotein oligosaccharide from the Bacillus anthracis exosporium. Chem Eur J 12:9136–9149. Melander C, Adden R, Brinkmalm G, Gorton L, Mischnick P. 2006. New approaches to the analysis of enzymatically hydrolyzed methyl cellulose. Part 2. Comparison of various enzyme preparations. Biomacromolecules 7:1410–1421. Mennella C, Visciano M, Napolitano A, Del-Castillo MD, Fogliano V. 2006. Glycation of lysine-containing dipeptides. J Peptide Sci 12:291– 296. Menon KN, Ikeda T, Fujimoto I, Narimatsu H, Nakakita S-I, Hase S, Ikenaka K. 2005. Changes in N-linked sugar chain patterns induced by moderate-to-high expression of the galactosyltransferase I gene in a brain-derived cell line, CG4. J Neurosci Res 80:29–36. Mass Spectrometry Reviews DOI 10.1002/mas & Mesaros M, Tarzi OI, Erra-Balsells R, Bilmes GM. 2006. The photophysics of some UV-MALDI matrices studied by using spectroscopic, photoacoustic and luminescence techniques. Chem Phys Lett 426:334–340. Meyer S, van-Liempt E, Imberty A, van-Kooyk Y, Geyer H, Geyer R, van-Die I. 2005. DC-SIGN mediates binding of dendritic cells to authentic pseudo-LewisY glycolipids of Schistosoma mansoni cercariae, the first parasite-specific ligand of DC-SIGN. J Biol Chem 280:37349–37359. Mills K, Eaton S, Ledger V, Young E, Winchester B. 2005. The synthesis of internal standards for the quantitative determination of sphingolipids by tandem mass spectrometry. Rapid Commun Mass Spectrom 19:1739– 1748. Mills K, Mills P, Jackson M, Worthington V, Beesley C, Mann A, Clayton P, Grunewald S, Keir G, Young L, Langridge J, Mian N, Winchester B. 2006. Diagnosis of congenital disorders of glycosylation type-I using protein chip technology. Proteomics 6:2295–2304. Minamisawa T, Suzuki K, Hirabayashi J. 2006. Systematic identification of N-acetylheparosan oligosaccharides by tandem mass spectrometric fragmentation. Rapid Commun Mass Spectrom 20:267–274. Minamisawa T, Suzuki K, Kajimoto N, Iida M, Maeda H, Hirabayashi J. 2006. Microscale preparation of even- and odd-numbered N-acetylheparosan oligosaccharides. Carbohydr Res 341:230–237. Miura T, Tsujino S, Satoh A, Goto K, Mizuno M, Noguchi M, Kajimoto T, Node M, Murakami Y, Imai N, Inazu T. 2005a. Fluorescence modification of Gb3 oligosaccharide and rapid synthesis of oligosaccharide moieties using fluorous protective group. Tetrahedron 61:6518–6526. Miura Y, Tay SKH, Aw MM, Eklund EA, Freeze HH. 2005b. Clinical and biochemical characterization of a patient with congenital disorder of glycosylation (CDG) IIx. J Pediatr 147:851–853. Miyamoto Y, Mukai T, Nakata N, Maeda Y, Kai M, Naka T, Yano I, Makino M. 2006. Identification and characterization of the genes involved in glycosylation pathways of mycobacterial glycopeptidolipid biosynthesis. J Bacteriol 188:86–95. Miyata S, Sato C, Kumita H, Toriyama M, Vacquier VD, Kitajima K. 2006. Flagellasialin: A novel sulfated a2,9-linked polysialic acid glycoprotein of sea urchin sperm flagella. Glycobiology 16:1229–1241. Miyauchi M, Hoshino T, Yamaguchi H, Kamitori S, Harada A. 2005. A [2]rotaxane capped by a cyclodextrin and a guest: Formation of supramolecular [2]rotaxane polymer. J Am Chem Soc 127:2034–2035. Miyazawa T, Funazukuri T. 2005. Polysaccharide hydrolysis accelerated by adding carbon dioxide under hydrothermal conditions. Biotechnol Prog 21:1782–1785. Miyazawa T, Funazukuri T. 2006. Noncatalytic hydrolysis of guar gum under hydrothermal conditions. Carbohydr Res 341:870–877. Mizuno M, Goto K, Miura T. 2005. Fluorous glycopeptide synthesis without protection of sugar hydroxy groups. Chem Lett 34:426–427. Mizuno M, Goto K, Miura T, Inazu T. 2006a. Rapid oligosaccharide and peptide syntheses on a recyclable fluorous support. QSAR Comb Sci 25:742–752. Mizuno M, Matsumoto H, Goto K, Hamasaki K. 2006b. Synthesis of aminoglycoside derivatives on a Cbz-type heavy fluorous tag. Tetrahedron Lett 47:8831–8835. Moe GR, Dave A, Granoff DM. 2005. Epitopes recognized by a nonautoreactive murine anti-N-propionyl meningococcal group B polysaccharide monoclonal antibody. Infect Immun 73:2123–2128. Mohamed HE, van de Meene AML, Roberson RW, Vermaas WFJ. 2005. Myxoxanthophyll is required for normal cell wall structure and thylakoid organization in the cyanobacterium Synechocystis sp. strain PCC 6803. J Bacteriol 187:6883–6892. Mohand FA, Farkaš V. 2006. Screening for hetero-transglycosylating activities in extracts from nasturtium (Tropaeolum majus). Carbohydr Res 341:577–581. Momcilovic D, Schagerlöf H, Wittgren B, Wahlund K-G, Brinkmalm G. 2005a. Improved chemical analysis of cellulose ethers using dialkyl- 89 & HARVEY amine derivatization and mass spectrometry. Biomacromolecules 6:2793–2799. Momcilovic D, Wahlund K-G, Wittgren B, Brinkmalm G. 2005b. Improved matrix-assisted laser desorption/ionisation sample preparation of a partially depolymerised cellulose derivative by continuous spray deposition and interfacing with size-exclusion chromatography. Rapid Commun Mass Spectrom 19:947–954. Monk CR, Sutton-Smith M, Dell A, Garden OA. 2006. Preparation of CD25þ and CD25 CD4þ T cells for glycomic analysis—A cautionary tale of serum glycoprotein sequestration. Glycobiology 16:11G–13G. Montoya-Peleaz PJ, Riley JG, Szarek WA, Valvano MA, Schutzbach JS, Brockhausen I. 2005. Identification of a UDP-Gal: GlcNAc-R galactosyltransferase activity in Escherichia coli VW187. Bioorg Med Chem Lett 15:1205–1211. Moon Y-H, Kim G, Lee J-H, Jin X-J, Kim D-W, Kim D. 2006. Enzymatic synthesis and characterization of novel epigallocatechin gallate glucosides. J Mol Catal B Enzym 40:1–7. Moore JP, Nguema-Ona E, Chevalier L, Lindsey GG, Brandt WF, Lerouge P, Farrant JM, Driouich A. 2006. Response of the leaf cell wall to desiccation in the resurrection plant Myrothamnus flabellifolius. Plant Physiol 141:651–662. Moraes G, Northcote PT, Silchenko AS, Antonov AS, Kalinovsky AI, Dmitrenok PS, Avilov SA, Kalinin VI, Stonik VA. 2005. Mollisosides A, B1, and B2: Minor triterpene glycosides from the New Zealand and South Australian sea cucumber Australostichopus mollis. J Nat Prod 68:842–847. Morales V, Sanz ML, Olano A, Corzo N. 2006. Rapid separation on activated charcoal of high oligosaccharides in honey. Chromatographia 64:233– 238. Morelle W, Canis K, Chirat F, Faid V, Michalski J-C. 2006a. The use of mass spectrometry for the proteomic analysis of glycosylation. Proteomics 6:3993–4015. Morelle W, Donadio S, Ronin C, Michalski J-C. 2006b. Characterization of Nglycans of recombinant human thyrotropin using mass spectrometry. Rapid Commun Mass Spectrom 20:331–345. Morelle W, Flahaut C, Michalski J-C, Louvet A, Mathurin P, Klein A. 2006c. Mass spectrometric approach for screening modifications of total serum N-glycome in human diseases: Application to cirrhosis. Glycobiology 16:281–293. Morelle W, Jimenez JC, Cieniewski-Bernard C, Dei-Cas E, Michalski JC. 2005a. Characterization of the N-linked glycans of Giardia intestinalis. Glycobiology 15:549–559. Morelle W, Michalski J-C. 2005. The mass spectrometric analysis of glycoproteins and their glycan structures. Curr Anal Chem 1:29–57. Morelle W, Slomianny M-C, Diemer H, Schaeffer C, van Dorsselaer A, Michalski J-C. 2005b. Structural characterization of 2-aminobenzamide-derivatized oligosaccharides using a matrix-assisted laser desorption/ionization two-stage time-of-flight tandem mass spectrometer. Rapid Commun Mass Spectrom 19:2075–2084. Morgan JR, Cloninger MJ. 2005. Synthesis of carbohydrate-linked poly(polyoxometalate) poly(amido)amine dendrimers. J Polym Sci A 43: 3059–3066. Morinaga O, Tanaka H, Shoyama Y. 2006. Detection and quantification of ginsenoside Re in ginseng samples by a chromatographic immunostaining method using monoclonal antibody against ginsenoside Re. J Chromatogr B 830:100–104. Morita YS, Sena CBC, Waller RF, Kurokawa K, Sernee MF, Nakatani F, Haites RE, Billman-Jacobe H, McConville MJ, Maeda Y, Kinoshita T. 2006. PimE is a polyprenol-phosphate-mannose-dependent mannosyltransferase that transfers the fifth mannose of phosphatidylinositol mannoside in mycobacteria. J Biol Chem 281:25143–25155. Morón B, Soria-Dı́az ME, Ault J, Verroios G, Noreen S, Rodrı́guez-Navarro DN, Gil-Serrano A, Thomas-Oates J, Megı́as M, Sousa C. 2005. Low 90 pH changes the profile of nodulation factors produced by Rhizobium tropici CIAT899. Chem Biol 12:1029–1040. Moscatiello R, Mariani P, Sanders D, Maathuis FJM. 2006. Transcriptional analysis of calcium-dependent and calcium-independent signalling pathways induced by oligogalacturonides. J Exp Bot 57:2847–2865. Mouille G, Witucka-Wall H, Bruyant M-P, Loudet O, Pelletier S, Rihouey C, Lerouxel O, Lerouge P, Höfte H, Pauly M. 2006. Quantitative trait loci analysis of primary cell wall composition in Arabidopsis. Plant Physiol 141:1035–1044. Mouyna I, Morelle W, Vai M, Monod M, Léchenne B, Fontaine T, Beauvais A, Sarfati J, Prévost M-C, Henry C, Latgé J-P. 2005. Deletion of GEL2 encoding for a b(1–3)glucanosyltransferase affects morphogenesis and virulence in Aspergillus fumigatus. Mol Microbiol 56:1675–1688. Mukherjee R, Gomez M, Jayaraman N, Smith I, Chatterji D. 2005. Hyperglycosylation of glycopeptidolipid of Mycobacterium smegmatis under nutrient starvation: Structural studies. Microbiology 151:2385– 2392. Müllegger JM, Chen HM, Warren RAJ, Withers SG. 2006. Glycosylation of a neoglycoprotein by using glycosynthase and thioglycoligase approaches: The generation of a thioglycoprotein. Angew Chem Int Ed Engl 45:2585–2588. Müller R, Allmaier G. 2006. Molecular weight determination of ultra-high mass compounds on a standard matrix-assisted laser desorption/ ionization time-of-flight mass spectrometer: PAMAM dendrimer generation 10 and immunoglobulin M. Rapid Commun Mass Spectrom 20:3803–3806. Murayama T, Tanabe T, Ikeda H, Ueno A. 2006. Direct assay for a-amylase using fluorophore-modified cyclodextrins. Bioorg Med Chem 14:3691–3696. Murozuka Y, Kasuya MCZ, Kobayashi M, Watanabe Y, Sato T, Hatanaka K. 2005. Efficient sialylation on azidododecyl lactosides by using B16 melanoma cells. Chem Biodiversity 2:1063–1078. Murphy RC, Raetz CRH, Reynolds CM, Barkley RM. 2005. Mass spectrometry advances in lipidomica: Collision-induced decomposition of Kdo2 –lipid A. Prostaglandins 77:131–140. Muthukrishnan S, Jutz G, André X, Mori H, Müller AHE. 2005. Synthesis of hyperbranched glycopolymers via self-condensing atom transfer radical copolymerization of a sugar-carrying acrylate. Macromolecules 38:9–18. Muthukrishnan S, Mori H, Müller AHE. 2005. Synthesis and characterization of methacrylate-type hyperbranched glycopolymers via self-condensing atom transfer radical copolymerization. Macromolecules 38:3108– 3119. Muzitano MF, Tinoco LW, Guette C, Kaiser CR, Rossi-Bergmann B, Costa SS. 2006. The antileishmanial activity assessment of unusual flavonoids from Kalanchoe pinnata. Phytochemistry 67:2071–2077. Nagahori N, Nishimura S-I. 2006. Direct and efficient monitoring of glycosyltransferase reactions on gold colloidal nanoparticles by using mass spectrometry. Chem Eur J 12:6478–6485. Nagaike F, Onuma Y, Kanazawa C, Hojo H, Ueki A, Nakahara Y, Nakahara Y. 2006. Efficient microwave-assisted tandem N- to S-acyl transfer and thioester exchange for the preparation of a glycosylated peptide thioester. Org Lett 8:4465–4468. Naka R, Kamoda S, Ishizuka A, Kinoshita M, Kakehi K. 2006. Analysis of total N-glycans in cell membrane fractions of cancer cells using a combination of serotonin affinity chromatography and normal phase chromatography. J Proteome Res 5:88–97. Nakagawa T, Uozumi N, Nakano M, Mizuno-Horikawa Y, Okuyama N, Taguchi T, Gu J, Kondo A, Taniguchi N, Miyoshi E. 2006. Fucosylation of N-glycans regulates the secretion of hepatic glycoproteins into bile ducts. J Biol Chem 281:29797–29806. Nakajima K, Kinoshita M, Matsushita N, Urashima T, Suzuki M, Suzuki A, Kakehi K. 2006. Capillary affinity electrophoresis using lectins for the Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES analysis of milk oligosaccharide structure and its application to bovine colostrum oligosaccharides. Anal Biochem 348:105–114. Nakamura K, Suzuki Y, Goto-Inoue N, Yoshida-Noro C, Suzuki A. 2006. Structural characterization of neutral glycosphingolipids by thin-layer chromatography coupled to matrix-assisted laser desorption/ionization quadrupole ion trap time-of-flight MS/MS. Anal Chem 78:5736–5743. Nakamura S, Yagi F, Totani K, Ito Y, Hirabayashi J. 2005. Comparative analysis of carbohydrate-binding properties of two tandem repeat-type Jacalin-related lectins, Castanea crenata agglutinin and Cycas revoluta leaf lectin. FEBS J 272:2784–2799. Nakano H, Shizuma M, Murakami H, Kiryu T, Kiso T. 2005. One-pot synthesis of glycosyl poly(arbutin) by enzymatic glycosylation followed by polymerization with peroxidase. J Mol Catal B Enzym 33:1–8. Naruchi K, Hamamoto T, Kurogochi M, Hinou H, Shimizu H, Matsushita T, Fujitani N, Kondo H, Nishimura S-I. 2006. Construction and structural characterization of versatile lactosaminoglycan-related compound library for the synthesis of complex glycopeptides and glycosphingolipids. J Org Chem 71:9609–9621. Nasi R, Pinto BM. 2006. Synthesis of new analogues of salacinol containing a pendant hydroxymethyl group as potential glycosidase inhibitors. Carbohydr Res 341:2305–2311. Natalello A, Ami D, Brocca S, Lotti M, Doglia SM. 2005. Secondary structure, conformational stability and glycosylation of a recombinant Candida rugosa lipase studied by Fourier-transform infrared spectroscopy. Biochem J 385:511–517. Nergard CS, Kiyohara H, Reynolds JC, Thomas-Oates JE, Matsumoto T, Yamada H, Michaelsen TE, Diallo D, Paulsen BS. 2005. Structureimmunomodulating activity relationships of a pectic arabinogalactan from Vernonia kotschyana Sch. Bip. ex Walp. Carbohydr Res 340:1789–1801. Nergard CS, Kiyohara H, Reynolds JC, Thomas-Oates JE, Matsumoto T, Yamada H, Patel T, Petersen D, Michaelsen TE, Diallo D, Paulsen BS. 2006. Structures and structure-activity relationships of three mitogenic and complement fixing pectic arabinogalactans from the Malian antiulcer plants Cochlospermum tinctorium A. Rich and Vernonia kotschyana Sch. Bip. ex Walp. Biomacromolecules 7:71–79. Neubacher B, Schmidt D, Ziegelmüller P, Thiem J. 2005. Preparation of sialylated oligosaccharides employing recombinant trans-sialidase from Trypanosoma cruzi. Org Biomol Chem 3:1551–1556. Neuhof T, Schmieder P, Seibold M, Preussel K, von Döhren H. 2006. Hassallidin B—Second antifungal member of the Hassallidin family. Bioorg Med Chem Lett 16:4220–4222. Ngantung FA, Miller PG, Brushett FR, Tang GL, Wang DI. 2006. RNA interference of sialidase improves glycoprotein sialic acid content consistency. Biotechnol Bioeng 95:106–119. Nguema-Ona E, Andème-Onzighi C, Aboughe-Angone S, Bardor M, Ishii T, Lerouge P, Driouich A. 2006. The reb 1-1 mutation of Arabidopsis. Effect on the structure and localization of galactose-containing cell wall polysaccharides. Plant Physiol 140:1406–1417. Niedziela T, Dag S, Lukasiewicz J, Dzieciatkowska M, Jachymek W, Lugowski C, Kenne L. 2006. Complete lipopolysaccharide of Plesiomonas shigelloides O74: H5 (strain CNCTC 144/92). 1. Structural analysis of the highly hydrophobic lipopolysaccharide, including the O-antigen, its biological repeating unit, the core oligosaccharide, and the linkage between them. Biochemistry 45:10422–10433. Niedziela T, Letowska I, Lukasiewicz J, Kaszowska M, Czarnecka A, Kenne L, Lugowski C. 2005. Epitope of the vaccine-type Bordetella pertussis strain 186 lipooligosaccharide and antiendotoxin activity of antibodies directed against the terminal pentasaccharide-tetanus toxoid conjugate. Infect Immun 73:7381–7389. Niikura K, Kamitani R, Kurogochi M, Uematsu R, Shinohara Y, Nakagawa H, Deguchi K, Monde K, Kondo H, Nishimura S. 2005. Versatile Mass Spectrometry Reviews DOI 10.1002/mas & glycoblotting nanoparticles for high-throughput protein glycomics. Chem Eur J 11:3825–3834. Ninonuevo MR, Park Y, Yin H, Zhang J, Ward RE, Clowers BH, German JB, Freeman SL, Killeen K, Grimm R, Lebrilla CB. 2006. A strategy for annotating the human milk glycome. J Agric Food Chem 54:7471– 7480. Nishimura S-I, Niikura K, Kurogochi M, Matsushita T, Fumoto M, Hinou H, Kamitani R, Nakagawa H, Deguchi K, Miura N, Monde K, Kondo H. 2005. High-throughput protein glycomics: Combined use of chemoselective glycoblotting and MALDI-TOF/TOF mass spectrometry. Angew Chem Int Ed Engl 44:91–96. Niwa T. 2006. Mass spectrometry for the study of protein glycation in disease. Mass Spectrom Rev 25:713–723. Nokami T, Werz DB, Seeberger PH. 2005. Synthesis and reactions of 1,4anhydrogalactopyranose and 1,4-anhydroarabinose—Steric and electronic limitations. Helv Chim Acta 88:2823–2831. Nolen EG, Kurish AJ, Potter JM, Donahue LA, Orlando MD. 2005. Stereoselective synthesis of a-C-glucosyl serine and alanine via a crossmetathesis/cyclization strategy. Org Lett 7:3383–3386. North SJ, Koles K, Hembd C, Morris HR, Dell A, Panin VM, Haslam SM. 2006. Glycomic studies of Drosophila melanogaster embryos. Glycoconj J 23:345–354. Novotny MV, Mechref Y. 2005. New hyphenated methodologies in highsensitivity glycoprotein analysis. J Sep Sci 28:1956–1968. Numata M, Ikeda A, Shinkai S. 2000. Properly assembled dendrons can be immobilized into dendrimers by in situ cross-link. Chem Lett 29:370– 371. O’Connor ET, Piekarowicz A, Swanson KV, Griffiss JM, Stein DC. 2006. Biochemical analysis of Lpt3, a protein responsible for phosphoethanolamine addition to lipooligosaccharide of pathogenic Neisseria. J Bacteriol 188:1039–1048. Oguri S, Yoshida A, Minowa MT, Takeuchi M. 2006. Kinetic properties and substrate specificities of two recombinant human N-acetylglucosaminyltransferase-IV isozymes. Glycoconj J 23:473–480. Ohga K, Takashima Y, Takahashi H, Kawaguchi Y, Yamaguchi H, Harada A. 2005. Preparation of supramolecular polymers from a cyclodextrin dimer and ditopic guest molecules: Control of structure by linker flexibility. Macromolecules 38:5897–5904. Ojima N, Masuda K, Tanaka K, Nishimura O. 2005. Analysis of neutral oligosaccharides for structural characterization by matrix-assisted laser desorption/ionization quadrupole ion trap time-of-flight mass spectrometry. J Mass Spectrom 40:380–388. Okada H, Fukushi E, Yamamori A, Kawazoe N, Onodera S, Kawabata J, Shiomi N. 2006. Structural analysis of a novel saccharide isolated from fermented beverage of plant extract. Carbohydr Res 341:925–929. Okuyama M, Tanimoto Y, Ito T, Anzai A, Mori H, Kimura A, Matsui H, Chiba S. 2005. Purification and characterization of the hyper-glycosylated extracellular a-glucosidase from Schizosaccharomyces pombe. Enzyme Microb Technol 37:472–480. Okuyama N, Ide Y, Nakano M, Nakagawa T, Yamanaka K, Moriwaki K, Murata K, Ohigashi H, Yokoyama S, Eguchi H, Ishikawa O, Ito T, Kato M, Kasahara A, Kawano S, Gu J, Taniguchi N, Miyoshi E. 2006. Fucosylated haptoglobin is a novel marker for pancreatic cancer: A detailed analysis of the oligosaccharide structure and a possible mechanism for fucosylation. Int J Cancer 118:2803–2808. Omaetxebarria MJ, Hägglund P, Elortza F, Hooper NM, Arizmendi JM, Jensen ON. 2006. Isolation and characterization of glycosylphosphatidylinositol-anchored peptides by hydrophilic interaction chromatography and MALDI tandem mass spectrometry. Anal Chem 78:3335– 3341. Omtvedt LA, Royle L, Husby G, Sletten K, Radcliffe CM, Harvey DJ, Dwek RA, Rudd PM. 2006. The glycan analysis of monoclonal antibodies secreted in deposition disorders indicates that subsets of 91 & HARVEY plasma cells differentially process IgG glycans. Arthritis Rheum 54:3433–3440. Onodera K-i, Hanashiro K, Yasumoto T. 2006. Camellianoside, a novel antioxidant glycoside from the leaves of Camellia japonica. Biosci Biotechnol Biochem 70:1995–1998. O’Reilly MK, Zhang G, Imperiali B. 2006. In vitro evidence for the dual function of Alg2 and Alg11: Essential mannosyltransferases in Nlinked glycoprotein biosynthesis. Biochemistry 45:9593–9603. Ortega-Caballero F, Bjerre J, Laustsen LS, Bols M. 2005. Four orders of magnitude rate increase in artificial enzyme-catalyzed aryl glycoside hydrolysis. J Org Chem 70:7217–7226. Oscarson S, Sehgelmeble FW. 2005. A stereoselective approach to phosphodiester-linked oligomers of the repeating unit of Escherichia coli K52 capsular polysaccharide containing b-D-fructofuranosyl moieties. Tetrahedron Asym 16:121–125. Ostendorp T, Weibel M, Leclerc E, Kleinert P, Kroneck PMH, Heizmann CW, Fritz G. 2006. Expression and purification of the soluble isoform of human receptor for advanced glycation end products (sRAGE) from Pichia pastoris. Biochem Biophys Res Commun 347:4–11. Otto VI, Damoc E, Cueni LN, Schürpf T, Frei R, Ali S, Callewaert N, Moise A, Leary JA, Folkers G, Przybylski M. 2006. N-glycan structures and Nglycosylation sites of mouse soluble intercellular adhesion molecule-1 revealed by MALDI-TOF and FTICR mass spectrometry. Glycobiology 16:1033–1044. Pabba J, Mohal N, Vasella A. 2006. Synthesis of glucuronic, mannuronic, and galacturonic acid-derived imidazoles as inhibitors of bovine liver bglucuronidase. Helv Chim Acta 89:1373–1386. Palm AK, Novotny MV. 2005. A monolithic PNGase F enzyme microreactor enabling glycan mass mapping of glycoproteins by mass spectrometry. Rapid Commun Mass Spectrom 19:1730–1738. Palm M, Zacchi G. 2003. Extraction of hemicellulosic oligosaccharides from spruce using microwave oven or steam treatment. Biomacromolecules 4:617–623. Pan C, Xu S, Hu L, Su X, Ou J, Zou H, Guo Z, Zhang Y, Guo B. 2005. Using oxidized carbon nanotubes as matrix for analysis of small molecules by MALDI-TOF MS. J Am Soc Mass Spectrom 16:883–892. Paramonov N, Rangarajan M, Hashim A, Gallagher A, Aduse-Opoku J, Slaney JM, Hounsell E, Curtis MA. 2005. Structural analysis of a novel anionic polysaccharide from Porphyromonas gingivalis strain W50 related to Arg-gingipain glycans. Mol Microbiol 58:847–863. Park H, Choi Y, Kang S, Lee S, Kwon C, Jung S. 2006. pH-dependent inclusion complexation of carboxymethylated cyclosophoraoses to Nacetylphenylalanine. Carbohydr Polym 64:85–91. Park JK, Khan T, Jung JY. 2006. Structural studies of the glucuronic acid oligomers produced by Gluconacetobacter hansenii strain. Carbohydr Polym 63:482–486. Park N-Y, Baek N-I, Cha J, Lee S-B, Auh J-H, Park C-S. 2005a. Production of a new sucrose derivative by transglycosylation of recombinant Sulfolobus shibatae b-glycosidase. Carbohydr Res 340:1089–1096. Park T-H, Choi K-W, Park C-S, Lee S-B, Kang H-Y, Shon K-J, Park J-S, Cha J. 2005b. Substrate specificity and transglycosylation catalyzed by a thermostable b-glucosidase from marine hyperthermophile Thermotoga neapolitana. Appl Microbiol Biotechnol 69:411–422. Parry S, Hadaschik D, Blancher C, Kumaran MK, Bochkina N, Morris HR, Richardson S, Aitman TJ, Gauguier D, Siddle K, Scott J, Dell A. 2006a. Glycomics investigation into insulin action. Biochim Biophys Acta 1760:652–668. Parry S, Hanisch FG, Leir S-H, Sutton-Smith M, Morris HR, Dell A, Harris A. 2006b. N-glycosylation of the MUC1 mucin in epithelial cells and secretions. Glycobiology 16:623–634. Paschinger K, Hackl M, Gutternigg M, Kretschmer-Lubich D, Stemmer U, Jantsch V, Lochnit G, Wilson IB. 2006. A deletion in the golgi alphamannosidase II gene of Caenorhabditis elegans results in unexpected non-wild-type N-glycan structures. J Biol Chem 281:28265–28277. 92 Paschinger K, Staudacher E, Stemmer U, Fabini G, Wilson IBH. 2005. Fucosyltransferase substrate specificity and the order of fucosylation in invertebrates. Glycobiology 15:463–474. Patel A, Lindhorst TK. 2006. Multivalent glycomimetics: Synthesis of nonavalent mannoside clusters with variation of spacer properties. Carbohydr Res 341:1657–1668. Pedersen NR, Kristensen JB, Bauw G, Ravoo BJ, Darcy R, Larsen KL, Pedersen LH. 2005. Thermolysin catalyses the synthesis of cyclodextrin esters in DMSO. Tetrahedron Asym 16:615–622. Pérez S, Mulloy B. 2005. Prospects for glycoinformatics. Curr Opin Struct Biol 15:517–524. Pérez-Balderas F, Hernández-Mateo F, Santoyo-González F. 2005. Synthesis of multivalent neoglycoconjugates by 1,3 dipolar cycloaddition of nitrile oxides and alkynes and evaluation of their lectin-binding affinities. Tetrahedron 61:9338–9348. Peri F, Marinzi C, Barath M, Granucci F, Urbano M, Nicotra F. 2006. Synthesis and biological evaluation of novel lipid A antagonists. Bioorg Med Chem 14:190–199. Peri F, Nicotra F, Leslie CP, Micheli F, Seneci P, Marchioro C. 2003. Dglucose as a regioselectively addressable scaffold for combinatorial chemistry on solid phase. J Carbohydr Chem 22:57–71. Péroche S, Degobert G, Putaux J-L, Blanchin M-G, Fessi H, Parrot-Lopez H. 2005. Synthesis and characterisation of novel nanospheres made from amphiphilic perfluoroalkylthio-b-cyclodextrins. Eur J Pharm Biopharm 60:123–131. Perrone A, Plaza A, Bloise E, Nigro P, Hamed AI, Belisario MA, Pizza C, Piacente S. 2005. Cytotoxic furostanol saponins and a megastigmane glucoside from Tribulus parvispinus. J Nat Prod 68:1549– 1553. Peter-Katalinic J. 2005. O-glycosylation of proteins. Methods Enzymol 405:139–171. Petruccelli S, Otegui MS, Lareu F, Dinh OT, Fitchette A-C, Circosta A, Rumbo M, Bardor M, Carcamo R, Gomord V, Beachy RN. 2006. A KDEL-tagged monoclonal antibody is efficiently retained in the endoplasmic reticulum in leaves, but is both partially secreted and sorted to protein storage vacuoles in seeds. Plant Biotechnol J 4:511– 527. Pinto MR, Gorin PAJ, Wait R, Mulloy B, Barreto-Bergter E. 2005. Structures of the O-linked oligosaccharides of a complex glycoconjugate from Pseudallescheria boydii. Glycobiology 15:895–904. Plaza A, Perrone A, Balestrieri C, Balestrieri ML, Bifulco G, Carbone V, Hamed A, Pizza C, Piacente S. 2005a. New antiproliferative 14,15secopregnane glycosides from Solenostemma argel. Tetrahedron 61: 7470–7480. Plaza A, Perrone A, Balestrieri ML, Felice F, Balestrieri C, Hamed AI, Pizza C, Piacente S. 2005b. New unusual pregnane glycosides with antiproliferative activity from Solenostemma argel. Steroids 70:594– 603. Pochec E, Litynska A, Bubka M, Amoresano A, Casbarra A. 2006. Characterization of the oligosaccharide component of a3b1 integrin from human bladder carcinoma cell line T24 and its role in adhesion and migration. Eur J Cell Biol 85:47–57. Pojasek K, Raman R, Sasisekharan R. 2005. Structural characterization of glycosaminoglycans. In: Yarema KJ, editor. Handbook of Carbohydrate Engineering. Boca Raton, FL: Taylor and Francis. pp 177–210. Powell AK, Harvey DJ. 1996. Stabilisation of sialic acids in N-linked oligosaccharides and gangliosides for analysis by positive ion matrixassisted laser desorption-ionization mass spectrometry. Rapid Commun Mass Spectrom 10:1027–1032. Preusser-Kunze A, Mariappan M, Schmidt B, Gande SL, Mutenda K, Wenzel D, von-Figura K, Dierks T. 2005. Molecular characterization of the human Ca-formylglycine-generating enzyme. J Biol Chem 280: 14900–14910. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Price NPJ. 2006. Oligosaccharide structures studied by hydrogen-deuterium exchange and MALDI-TOF mass spectrometry. Anal Chem 78:5302– 5308. Prior JL, Prior RG, Hitchen PG, Diaper H, Griffin KF, Morris HR, Dell A, Titball RW. 2003. Characterization of the O antigen gene cluster and structural analysis of the O antigen of Francisella tularensis subsp. tularensis. J Med Microbiol 52:845–851. Psylinakis E, Boneca IG, Mavromatis K, Deli A, Hayhurst E, Foster SJ, Vårum KM, Bouriotis V. 2005. Peptidoglycan N-acetylglucosamine deacetylases from Bacillus cereus, highly conserved proteins in Bacillus anthracis. J Biol Chem 280:30856–30863. Pudelko M, Lindgren A, Tengel T, Reis CA, Elofsson M, Kihlberg J. 2006. Formation of lactones from sialylated MUC1 glycopeptides. Org Biomol Chem 4:713–720. Raju TS, Scallon BJ. 2006. Glycosylation in the Fc domain of IgG increases resistance to proteolytic cleavage by papain. Biochem Biophys Res Commun 341:797–803. Raman R, Raguram S, Venkataraman G, Paulson JC, Sasisekharan R. 2005. Glycomics: An integrated systems approach to structure-function relationships of glycans. Nat Methods 2:817–824. Raman R, Venkataraman M, Ramakrishnan S, Lang W, Raguram S, Sasisekharan R. 2006. Advancing glycomics: Implementation strategies at the Consortium for Functional Glycomics. Glycobiology 16:82R–90R. Rättö M, Verhoef R, Suihko M-L, Blanco A, Schols HA, Voragen AGJ, Wilting R, Siika-aho M, Buchert J. 2006. Colanic acid is an exopolysaccharide common to many enterobacteria isolated from paper-machine slimes. J Ind Microbiol Biotechnol 33:359–367. Ray B. 2006. Polysaccharides from Enteromorpha compressa: Isolation, purification and structural features. Carbohydr Polym 66:408– 416. Rebber BL, Halfacre JA, Beran KA, Beller NR, Gomez M, Bashir S, Giannakopulos AE, Derrick PJ. 2006. Theoretical investigation of the proton affinity and gas-phase basicity of neutral x,y-dihydroxybenzoic acid and its derivatives. Eur J Mass Spectrom 12:385–396. Regué M, Izquierdo L, Fresno S, Jimenez N, Piqué N, Corsaro MM, Parrilli M, Naldi T, Merino S, Tomás JM. 2005a. The incorporation of glucosamine into enterobacterial core lipopolysaccharide. Two enzymatic steps are required. J Biol Chem 280:36648–36656. Regué M, Izquierdo L, Fresno S, Piqué N, Corsaro MM, Naldi T, De Castro C, Waidelich D, Merino S, Tomás JM. 2005b. A second outer-core region in Klebsiella pneumoniae lipopolysaccharide. J Bacteriol 187:4198– 4206. Reife RA, Coats SR, Al-Qutub M, Dixon DM, Braham PA, Billharz RJ, Howald WN, Darveau RP. 2006. Porphyromonas gingivalis lipopolysaccharide lipid A heterogeneity: Differential activities of tetraand penta-acylated lipid A structures on E-selectin expression and TLR4 recognition. Cell Microbiol 8:857–868. Rele SM, Cui W, Wang L, Hou S, Barr-Zarse G, Tatton D, Gnanou Y, Esko JD, Chaikof EL. 2005. Dendrimer-like PEO glycopolymers exhibit antiinflammatory properties. J Am Chem Soc 127:10132–10133. Ren S-F, Zhang L, Cheng Z-H, Guo YL. 2005. Immobilized carbon nanotubes as matrix for MALDI-TOF-MS analysis: Applications to neutral small carbohydrates. J Am Soc Mass Spectrom 16:333–339. Rendic D, Linder A, Paschinger K, Borth N, Wilson IB, Fabini G. 2006. Modulation of neural carbohydrate epitope expression in Drosophila melanogaster cells. J Biol Chem 281:3343–3353. Restelli V, Wang MD, Huzel N, Ethier M, Perreault H, Butler M. 2006. The effect of dissolved oxygen on the production and the glycosylation profile of recombinant human erythropoietin produced from CHO cells. Biotechnol Bioeng 94:481–489. Reyes E, Córdova A. 2005. Amino acid-catalyzed dynamic kinetic asymmetric transformations (DYKAT): One-step de novo synthesis of Mass Spectrometry Reviews DOI 10.1002/mas & polyketide sugars from racemic b-hydroxy aldehydes. Tetrahedron Lett 46:6605–6609. Reynolds CM, Kalb SR, Cotter RJ, Raetz CRH. 2005. A phosphoethanolamine transferase specific for the outer 3-deoxy-D-manno-octulosonic acid residue of Escherichia coli lipopolysaccharide. Identification of the eptB gene and Ca2þ hypersensitivity of an eptB deletion mutant. J Biol Chem 280:21202–21211. Reynolds CM, Ribeiro AA, McGrath SC, Cotter RJ, Raetz CRH, Trent MS. 2006. An outer membrane enzyme encoded by Salmonella typhimurium lpxR that removes the 3’-acyloxyacyl moiety of lipid A. J Biol Chem 281:21974–21987. Ribeiro AO, Tomé JPC, Neves MGPMS, Tomé AC, Cavaleiro JAS, Iamamoto Y, Torres T. 2006. [1,2,3,4-Tetrakis(a/b-D-galactopyranos-6-yl)phthalocyaninato]zinc(II): Awater-soluble phthalocyanine. Tetrahedron Lett 47:9177–9180. Robinson S, Routledge A, Thomas-Oates J. 2005. Characterisation and proposed origin of mass spectrometric ions observed 30 Th above the ionised molecules of per-O-methylated carbohydrates. Rapid Commun Mass Spectrom 19:3681–3688. Röhrig CH, Retz OA, Hareng L, Hartung T, Schmidt RR. 2005. A new strategy for the synthesis of dinucleotides loaded with glycosylated amino acids—Investigations on in vitro non-natural amino acid mutagenesis for glycoprotein synthesis. ChemBioChem 6:1805–1816. Roper JR, Guther ML, Macrae JI, Prescott AR, Hallyburton I, Acosta-Serrano A, Ferguson MA. 2005. The suppression of galactose metabolism in procylic form Trypanosoma brucei causes cessation of cell growth and alters procyclin glycoprotein structure and copy number. J Biol Chem 280:19728–19736. Rösch A, Kunz H. 2006. Highly regioselective synthesis of a 3-O-sulfonated arabino Lewis asparagine building block suitable for glycopeptide synthesis. Carbohydr Res 341:1597–1608. Rose NL, Completo GC, Lin S-J, McNeil M, Palcic MM, Lowary TL. 2006. Expression, purification, and characterization of a galactofuranosyltransferase involved in Mycobacterium tuberculosis arabinogalactan biosynthesis. J Am Chem Soc 128:6721–6729. Rousseau C, Ortega-Caballero F, Nordstrøm LU, Christensen B, Petersen TE, Bols M. 2005. Artificial glycosyl phosphorylases. Chem Eur J 11: 5094–5101. Roychowdhury A, Wolfert MA, Boons G-J. 2005. Synthesis and proinflammatory properties of muramyl tripeptides containing lysine and diaminopimelic acid moieties. ChemBioChem 6:2088–2097. Rustam T, McClean S, Newcombe J, McFadden J, Eales-Reynolds L-J. 2006. Reduced toxicity of lipo-oligosaccharide from a phoP mutant of Neisseria meningitidis: An in vitro demonstration. J Endotox Res 12:39–46. Sagi D, Kienz P, Denecke J, Marquardt T, Peter-Katalinic J. 2005. Glycoproteomics of N-glycosylation by in-gel deglycosylation and matrix-assisted laser desorption/ionisation-time of flight mass spectrometry mapping: Application to congenital disorders of glycosylation. Proteomics 5:2689–2701. Saito R, Yamaguchi K. 2005. Effect of guest compounds on template polymerization of multivinyl monomer of cyclodextrins. Macromolecules 38:2085–2092. Saksena R, Adamo R, Kovác P. 2005. Studies toward a conjugate vaccine for anthrax. Synthesis and characterization of anthrose [4,6-dideoxy-4-(3hydroxy-3-methylbutanamido)-2-O-methyl-D-glucopyranose] and its methyl glycosides. Carbohydr Res 340:1591–1600. Saksena R, Zhang J, Kovác P. 2005. Immunogens from a synthetic hexasaccharide fragment of the O-SP of Vibrio cholerae O:1, serotype Ogawa. Tetrahedron Asym 16:187–197. Sandler JS, Forsburg SL, Faulkner DJ. 2005. Bioactive steroidal glycosides from the marine sponge Erylus lendenfeldi. Tetrahedron 61:1199– 1206. 93 & HARVEY Sanz ML, Côté GL, Gibson GR, Rastall RA. 2005. Prebiotic properties of alternansucrase maltose-acceptor oligosaccharides. J Agric Food Chem 53:5911–5916. Sanz ML, Côté GL, Gibson GR, Rastall RA. 2006. Selective fermentation of gentiobiose-derived oligosaccharides by human gut bacteria and influence of molecular weight. FEMS Microbiol Ecol 56:383–388. Sanz-Nebot V, Benavente F, Giménez E, Barbosa J. 2005. Capillary electrophoresis and matrix-assisted laser desorption/ionization-time of flight-mass spectrometry for analysis of the novel erythropoiesisstimulating protein (NESP). Electrophoresis 26:1451–1456. Sarkar M, Leventis PA, Silvescu CI, Reinhold VN, Schachter H, Boulianne GL. 2006. Null mutations in drosophila N-acetylglucosaminyltransferase I produce defects in locomotion and a reduced life span. J Biol Chem 281:12776–12785. Sasaki A, Ishimizu T, Geyer R, Hase S. 2005. Synthesis of b-mannosides using the transglycosylation activity of endo-b-mannosidase from Lilium longiflorum. FEBS J 272:1660–1668. Sasaki S, Shirahashi Y, Nishiyama K, Watanabe H, Hayase F. 2006. Identification of a novel blue pigment as a melanoidin intermediate in the D-xylose-glycine reaction system. Biosci Biotechnol Biochem 70:2529–2531. Sasisekharan R, Shriver Z, Sundaram M, Venkataraman G. 2006. Analytical techniques for the characterization and sequencing of glycosylaminoglycans. In: Wong C-H, editor. Carbohydrate-based drug discovery. Hoboken, NJ: Wiley VCH. pp 517–540. Sato H, Seino T, Yamamoto A, Torimura M, Tao H. 2005. Soft laser desorption/ionization mass spectrometry using a pyroelectric ceramic plate. Chem Lett 34:1178–1179. Sato K, Hada N, Takeda T. 2006. Syntheses of new peptidic glycoclusters derived from b-alanine: Di- and trimerized glycoclusters and glycocluster-clusters. Carbohydr Res 341:836–845. Satterfield MB, Welch MJ. 2005. Comparison by LC-MS and MALDI-MS of prostate-specific antigen from five commercial sources with certified reference material 613. Clin Biochem 38:166–174. Schagerlöf H, Richardson S, Momcilovic D, Brinkmalm G, Wittgren B, Tjerneld F. 2006. Characterization of chemical substitution of hydroxypropyl cellulose using enzymatic degradation. Biomacromolecules 7:80–85. Schimmel J, Eleutério MIP, Ritter G, Schmidt RR. 2006. Synthesis of saponins with cholestanol, cholesterol, and friedelanol as aglycones. Eur J Org Chem:1701–1721. Schmitt A, Bigl K, Meiners I, Schmitt J. 2006. Induction of reactive oxygen species and cell survival in the presence of advanced glycation end products and similar structures. Biochim Biophys Acta 1763:927–936. Schmitt A, Gasic-Milenkovic J, Schmitt J. 2005. Characterization of advanced glycation end products: Mass changes in correlation to side chain modifications. Anal Biochem 346:101–106. Schulz E, Karas M, Rosu F, Gabelica V. 2006. Influence of the matrix on analyte fragmentation in atmospheric pressure MALDI. J Am Soc Mass Spectrom 17:1005–1013. Schuster M, Umana P, Ferrara C, Brünker P, Gerdes C, Waxenecker G, Wiederkum S, Schwager C, Loibner H, Himmler G, Mudde GC. 2005. Improved effector functions of a therapeutic monoclonal Lewis Yspecific antibody by glycoform engineering. Cancer Res 65:7934– 7941. Schweizer F, Hindsgaul O. 2006. Synthesis of a galacto-configured Cketoside-based g-sugar-amino acid and its use in peptide coupling reactions. Carbohydr Res 341:1730–1736. Šebela M, Štosová T, Havli J, Wielsch N, Thomas H, Zdráhal Z, Shevchenko A. 2006. Thermostable trypsin conjugates for high-throughput proteomics: Synthesis and performance evaluation. Proteomics 6: 2959–2963. Sekiya S, Wada Y, Tanaka K. 2005. Derivatization for stabilizing sialic acids in MALDI-MS. Anal Chem 77:4962–4968. 94 Sekiya S, Yamaguchi Y, Kato K, Tanaka K. 2005. Mechanistic elucidation of the formation of reduced 2-aminopyridine-derivatized oligosaccharides and their application in matrix-assisted laser desorption/ionization mass spectrometry. Rapid Commun Mass Spectrom 19:3607–3611. Seo E-S, Lee J-H, Park J-Y, Kim D, Han H-J, Robyt JF. 2005. Enzymatic synthesis and anti-coagulant effect of salicin analogs by using the Leuconostoc mesenteroides glucansucrase acceptor reaction. J Biotechnol 117:31–38. Seppala U, Hagglund P, Wurtzen PA, Ipsen H, Thorsted P, Lenhard T, Roepstorff P, Spangfort MD. 2005. Molecular characterization of major cat allergen Fel d 1: Expression of heterodimer by use of a baculovirus expression system. J Biol Chem 280:3208–3216. Seyfried NT, Blundell CD, Day AJ, Almond A. 2005. Preparation and application of biologically active fluorescent hyaluronan oligosaccharides. Glycobiology 15:303–312. Shao N, Guo Z. 2005. Solution-phase synthesis with solid-state workup of an O-glycopeptide with a cluster of cancer-related T antigens. Org Lett 7:3589–3592. Sherlock O, Dobrindt U, Jensen JP, Vejborg RM, Klemm P. 2006. Glycosylation of the self-recognizing Escherichia coli Ag43 autotransporter protein. J Bacteriol 188:1798–1807. Shimizu M, Igasaki T, Yamada M, Yuasa K, Hasegawa J, Kato T, Tsukagoshi H, Nakamura K, Fukuda H, Matsuoka K. 2005. Experimental determination of proline hydroxylation and hydroxyproline arabinogalactosylation motifs in secretory proteins. Plant J 42:877–889. Shimma Y-I, Saito F, Oosawa F, Jigami Y. 2006. Construction of a library of human glycosyltransferases immobilized in the cell wall of Saccharomyces cerevisiae. Appl Environ Microbiol 72:7003–7012. Shinya T, Ménard R, Kozone I, Matsuoka H, Shibuya N, Kauffmann S, Matsuoka K, Saito M. 2006. Novel b-1,3-, 1,6-oligoglucan elicitor from Alternaria alternata 102 for defense responses in tobacco. FEBS J 273:2421–2431. Shoda S-I, Misawa Y, Nishijima Y, Tawata Y, Kotake T, Noguchi M, Kobayashi A, Watanabe T. 2006. Chemo-enzymatic synthesis of novel oligo-N-acetyllactosamine derivatives having a b(1-4)-b(1-6) repeating unit by using transition state analogue substrate. Cellulose 13:477–484. Sicherl F, Wittmann V. 2005. Orthogonally protected sugar diamino acids as building blocks for linear and branched oligosaccharide mimetics. Angew Chem Int Ed Engl 44:2096–2099. Siemiatkoski J, Lyubarskaya Y, Houde D, Tep S, Mhatre R. 2006. A comparison of three techniques for quantitative carbohydrate analysis used in characterization of therapeutic antibodies. Carbohydr Res 341:410–419. Silchenko AS, Avilov SA, Antonov AS, Kalinovsky AI, Dmitrenok PS, Kalinin VI, Stonik VA, Woodward C, Collin PD. 2005. Glycosides from the sea cucumber Cucumaria frondosa. III. Structure of frondosides A21, A2-2, A2-3, and A2-6, four new minor monosulfated triterpene glycosides. Can J Chem 83:21–27. Silipo A, Lanzetta R, Parrilli M, Sturiale L, Garozzo D, Nazarenko EL, Gorshkova RP, Ivanova EP, Molinaro A. 2005a. The complete structure of the core carbohydrate backbone from the LPS of marine halophilic bacterium Pseudoalteromonas carrageenovora type strain IAM 12662T. Carbohydr Res 340:1475–1482. Silipo A, Leone S, Molinaro A, Sturiale L, Garozzo D, Nazarenko EL, Gorshkova RP, Ivanova EP, Lanzetta R, Parrilli M. 2005b. Complete structural elucidation of a novel lipooligosaccharide from the outer membrane of the marine bacterium Shewanella pacifica. Eur J Org Chem:2281–2291. Silipo A, Molinaro A, Cescutti P, Bedini E, Rizzo R, Parrilli M, Lanzetta R. 2005c. Complete structural characterization of the lipid A fraction of a clinical strain of B. cepacia genomovar I lipopolysaccharide. Glycobiology 15:561–570. Silipo A, Molinaro A, Comegna D, Struiale L, Cescutti P, Garozzo D, Lanzetta R, Parrilli M. 2006. Full structural characterisation of the Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES lipooligosaccharide of a Burkholderia pyrrocinia clinical isolate. Eur J Org Chem:4874–4883. Silipo A, Molinaro A, Nazarenko EL, Sturiale L, Garozzo D, Gorshkova RP, Nedashkovskaya OI, Lanzetta R, Parrilli M. 2005d. Structural characterization of the carbohydrate backbone of the lipooligosaccharide of the marine bacterium Arenibacter certesii strain KMM 3941T. Carbohydr Res 340:2540–2549. Silipo A, Molinaro A, Sturiale L, Dow JM, Erbs G, Lanzetta R, Newman MA, Parrilli M. 2005e. The elicitation of plant innate immunity by lipooligosaccharide of Xanthomonas campestris. J Biol Chem 280: 33660–33668. Silván JM, van de Lagemaat J, Olano A, del Castillo MD. 2006. Analysis and biological properties of amino acid derivates formed by Maillard reaction in foods. J Pharm Biomed Anal 41:1543–1551. Skhirtladze A, Plaza A, Montoro P, Benidze M, Kemertelidze E, Pizza C, Piacente S. 2006. Furostanol saponins from Yucca gloriosa L. rhizomes. Biochem Syst Ecol 34:809–814. Skov LK, Seppala U, Coen JJ, Crickmore N, King TP, Monsalve R, Kastrup JS, Spangfort MD, Gajhede M. 2006. Structure of recombinant Ves v 2 at 2.0 Angstrom resolution: Structural analysis of an allergenic hyaluronidase from wasp venom. Acta Cryst 62:595–604. Smith DK, Hirst AR, Love CS, Hardy JG, Brignell SV, Huang B. 2005. Selfassembly using dendritic building blocks—Towards controllable nanomaterials. Prog Polym Sci 30:220–293. Snovida SI, Chen VC, Krokhin O, Perreault H. 2006. Isolation and identification of sialylated glycopeptides from bovine a1-acid glycoprotein by off-line capillary electrophoresis MALDI-TOF mass spectrometry. Anal Chem 78:6556–6563. Snovida SI, Chen VC, Perreault H. 2006. Use of a 2,5-dihydroxybenzoic acid/aniline MALDI matrix for improved detection and on-target derivatization of glycans: A preliminary report. Anal Chem 78:8561– 8568. Sol A, Charmot A, Krausz P, Trombotto S, Queneau Y. 2005. Synthesis of new glucosylated porphyrins bearing an a-D-linkage. J Carbohydr Chem 25:345–360. Sol V, Chaleix V, Champavier Y, Granet R, Huang Y-M, Krausz P. 2006. Glycosyl bis-porphyrin conjugates: Synthesis and potential application in PDT. Bioorg Med Chem 14:7745–7760. Soltés L, Stankovskyá M, Brezová V, Schiller J, Arnhold J, Mendichi R, Kogan G, Gemeiner P. 2006. Hyaluronan degradation by copper(II) chloride and ascorbate: Rotational viscometric, EPR spin-trapping and MALDI-TOF mass spectrometric investigations. Carbohydr Res 341:2826–2834. Sørensen AL, Reis CA, Tarp MA, Mandel U, Ramachandran K, Sankaranarayanan V, Schwientek T, Graham R, Taylor-Papadimitriou J, Hollingsworth MA, Burchell J, Clausen H. 2006. Chemoenzymatically synthesized multimeric Tn/STn MUC1 glycopeptides elicit cancerspecific anti-MUC1 antibody responses and override tolerance. Glycobiology 16:96–107. Soria-Dı́az ME, Rodrı́guez-Carvajal MA, Tejero-Mateo P, Espartero JL, Morón B, Sousa C, Megı́as M, Thomas-Oates J, Gil-Serrano AM. 2006. Structural determination of the Nod factors produced by Rhizobium gallicum bv. gallicum R602. FEMS Microbiol Lett 255:164–173. Sparbier K, Koch S, Kessler I, Wenzel T, Kostrzewa M. 2005. Selective isolation of glycoproteins and glycopeptides for MALDI-TOF MS detection supported by magnetic particles. J Biomol Tech 16:405–411. Sparbier K, Wenzel T, Kostrzewa M. 2006. Exploring the binding profiles of ConA, boronic acid and WGA by MALDI-TOF/TOF MS and magnetic particles. J Chromatogr B 840:29–36. Srinivas O, Mitra N, Surolia A, Jayaraman N. 2005. Photoswitchable cluster glycosides as tools to probe carbohydrate-protein interactions: Synthesis and lectin-binding studies of azobenzene containing multivalent sugar ligands. Glycobiology 15:861–873. Mass Spectrometry Reviews DOI 10.1002/mas & St. John FJ, Rice JD, Preston JF. 2006. Characterization of XynC from Bacillus subtilis subsp. subtilis strain 168 and analysis of its role in depolymerization of glucuronoxylan. J Bacteriol 188:8617–8626. Stadthagen G, Jackson M, Charles P, Boudou F, Barilone N, Huerre M, Constant P, Liav A, Bottova I, Nigou J, Brando T, Puzo G, Daffé M, Benjamin P, Coade S, Buxton RS, Tascon RE, Rae A, Robertson BD, Lowrie DB, Young DB, Gicquel B, Griffin R. 2006. Comparative investigation of the pathogenicity of three Mycobacterium tuberculosis mutants defective in the synthesis of p-hydroxybenzoic acid derivatives. Microbes Infect 8:2245–2253. Stadthagen G, Kordulakova J, Griffin R, Constant P, Bottova I, Barilone N, Gicquel B, Daffe M, Jackson M. 2005. p-Hydroxybenzoic acid synthesis in Mycobacterium tuberculosis. J Biol Chem 280:40699– 40706. Staehelin C, Forsberg LS, D’Haeze W, Gao M-Y, Carlson RW, Xie Z-P, Pellock BJ, Jones KM, Walker GC, Streit WR, Broughton WJ. 2006. Exo-oligosaccharides of Rhizobium sp. strain NGR234 are required for symbiosis with various legumes. J Bacteriol 188:6168–6178. Staniszewska M, Jarosz S, Jon M, Gamian A. 2005. Advanced glycation endproducts prepared in solution under high pressure contain epitopes distinct from those formed in the dry reaction at high temperature. Arch Immunol Exp Ther 53:71–78. Stanley P, Sundaram S, Tang J, Shi S. 2005. Molecular analysis of three gainof-function CHO mutants that add the bisecting GlcNAc to N-glycans. Glycobiology 15:43–53. Stead C, Tran A, Ferguson DJ, McGrath S, Cotter R, Trent S. 2005. A novel 3deoxy-D-manno-octulosonic acid (Kdo) hydrolase that removes the outer Kdo sugar of Helicobacter pylori lipopolysaccharide. J Bacteriol 187:3374–3383. Steiner K, Pohlentz G, Dreisewerd K, Berkenkamp S, Messner P, PeterKatalinic J, Schäffer C. 2006. New Insights into the glycosylation of the surface layer protein SgsE from Geobacillus stearothermophilus NRS 2004/3a. J Bacteriol 188:7914–7921. Strasser R, Schoberer J, Jin C, Glössl J, Mach L, Steinkellner H. 2006. Molecular cloning and characterization of Arabidopsis thaliana Golgi a-mannosidase II, a key enzyme in the formation of complex N-glycans in plants. Plant J 45:789–803. Strasser R, Stadlmann J, Svoboda B, Altmann F, Glössl J, Mach L. 2005. Molecular basis of N-acetylglucosaminyltransferase I deficiency in Arabidopsis thaliana plants lacking complex N-glycans. Biochem J 387:385–391. Stübiger G, Marchetti M, Nagano M, Grimm R, Gmeiner G, Reichel C, Allmaier G. 2005a. Characterization of N- and O-glycopeptides of recombinant human erythropoietins as potential biomarkers for doping analysis by means of microscale sample purification combined with MALDI-TOF and quadrupole IT/RTOF mass spectrometry. J Sep Sci 28:1764–1778. Stübiger G, Marchetti M, Nagano M, Reichel C, Gmeiner G, Allmaier G. 2005b. Characterisation of intact recombinant human erythropoietins applied in doping by means of planar gel electrophoretic techniques and matrix-assisted laser desorption/ionisation linear time-of-flight mass spectrometry. Rapid Commun Mass Spectrom 19:728–742. Sturiale L, Barone R, Fiumara A, Perez M, Zaffanello M, Sorge G, Pavone L, Tortorelli S, O’Brien JF, Jaeken J, Garozzo D. 2005a. Hypoglycosylation with increased fucosylation and branching of serum transferrin Nglycans in untreated galactosemia. Glycobiology 15:1268–1276. Sturiale L, Garozzo D, Silipo A, Lanzetta R, Parrilli M, Molinaro A. 2005b. New conditions for matrix-assisted laser desorption/ionization mass spectrometry of native bacterial R-type lipopolysaccharides. Rapid Commun Mass Spectrom 19:1829–1834. Subramaniam V, Gurcha SS, Besra GS, Lowary TL. 2005. Modified mannose disaccharides as substrates and inhibitors of a polyprenol monophosphomannose-dependent a-(1-6)-mannosyltransferase involved in 95 & HARVEY mycobacterial lipoarabinomannan biosynthesis. Bioorg Med Chem 13:1083–1094. Sun Y, Hayakawa S, Ogawa M, Izumori K. 2005. Evaluation of the site specific protein glycation and antioxidant capacity of rare sugarprotein/peptide conjugates. J Agric Food Chem 53:10205–10212. Sun Y, Hayakawa S, Puangmanee S, Izumori K. 2006. Chemical properties and antioxidative activity of glycated a-lactalbumin with a rare sugar, Dallose, by Maillard reaction. Food Chem 95:509–517. Sundgren A, Lahmann M, Oscarson S. 2005. Block synthesis of Streptococcus pneumoniae type 14 capsular polysaccharide structures. J Carbohydr Chem 24:379–391. Suzuki H, Yamagaki T, Tachibana K. 2005. Optimization of matrix and amount of ammonium chloride additive for effective ionization of neutral oligosaccharides as chloride ion adducts in negative-mode MALDI-TOF mass spectrometry. J Mass Spectrom Soc Jpn 53:227– 229. Suzuki H, Yamagaki T, Tachibana K. 2006. Optimization for effective ionization of neutral oligosaccharides in negative-ion MALDI-MS. Nippon Kagakkai Koen Yokoshu 86:503. Suzuki S, Fujimori T, Yodoshi M. 2006. Recovery of free oligosaccharides from derivatives labeled by reductive amination. Anal Biochem 354: 94–103. Suzuki T, Hara I, Nakano M, Shigeta M, Nakagawa T, Kondo A, Funakoshi Y, Taniguchi N. 2006a. Man2C1, an a-mannosidase, is involved in the trimming of free oligosaccharides in the cytosol. Biochem J 400: 33–41. Suzuki T, Hara I, Nakano M, Zhao G, Lennarz WJ, Schindelin H, Taniguchi N, Totani K, Matsuo I, Ito Y. 2006b. Site-specific labeling of cytoplasmic peptide: N-glycanase by N,N’-diacetylchitobiose-related compounds. J Biol Chem 281:22152–22160. Suzuki Y, Suzuki M, Ito E, Goto-Inoue N, Miseki K, Iida J, Yamazaki Y, Yamada M, Suzuki A. 2006c. Convenient structural analysis of glycosphingolipids using MALDI-QIT-TOF mass spectrometry with increased laser power and cooling gas flow. J Biochem (Tokyo) 139: 771–777. Suzuki Y, Suzuki M, Ito E, Ishii H, Miseki K, Suzuki A. 2005. Convenient and rapid analysis of linkage isomers of fucose-containing oligosaccharides by matrix-assisted laser desorption/ionization quadrupole ion trap timeof-flight mass spectrometry. Glycoconj J 22:427–431. Suzuki Y, Suzuki M, Nakahara Y, Ito Y, Ito E, Goto N, Miseki K, Iida J, Suzuki A. 2006d. Structural characterization of glycopeptides by N-terminal protein ladder sequencing. Anal Chem 78:2239–2243. Svarovsky SA, Szekely Z, Barchi JJ. 2005. Synthesis of gold nanoparticles bearing the Thomsen-Friedenreich disaccharide: A new multivalent presentation of an important tumor antigen. Tetrahedron Asym 16:587– 598. Swanson KV, Griffiss JM. 2006. Separation and identification of neisserial lipooligosaccharide oligosaccharides using high-performance anionexchange chromatography with pulsed amperometric detection. Carbohydr Res 341:388–396. Swanwick RS, Daines AM, Flitsch SL, Allemann RK. 2005. Synthesis of homogenous site-selectively glycosylated proteins. Org Biomol Chem 3:572–574. Szafranek J, Kumirska J, Czerwicka M, Kunikowska D, Dziadziuszko H, Glosnicka R. 2006. Structure and heterogeneity of the O-antigen chain of Salmonella agona lipopolysaccharide. FEMS Immunol Med Microbiol 48:223–236. Szolcsányi P, Gracza T. 2006. PdCl2/CuCl2-catalysed chlorocyclisation of sugar-derived aminoalkenitols in the synthesis of new iminohexitols. Tetrahedron 62:8498–8502. Sztaricskai F, Sum A, Roth E, Pelyvás IF, Sándor S, Batta G, Herczegh P, Reményi J, Miklán Z, Hudecz F. 2005. A new class of semisynthetic anthracycline glycoside antibiotics incorporating a squaric acid moiety. J Antibiot 58:704–714. 96 Taguchi F, Takeuchi K, Katoh E, Murata K, Suzuki T, Marutani M, Kawasaki T, Eguchi M, Katoh S, Kaku H, Yasuda C, Inagaki Y, Toyoda K, Shiraishi T, Ichinose Y. 2006. Identification of glycosylation genes and glycosylated amino acids of flagellin in Pseudomonas syringae pv. tabaci. Cell Microbiol 8:923–938. Taira H, Nagase H, Endo T, Ueda H. 2006. Isolation, purification and characterization of large-ring cyclodextrins (CD36-CD39). J Incl Phenom Macrocyclic Chem 56:23–28. Tajiri M, Yoshida S, Wada Y. 2005. Differential analysis of site-specific glycans on plasma and cellular fibronectins: Application of a hydrophilic affinity method for glycopeptide enrichment. Glycobiology 15:1332–1340. Takahashi H, Takashima Y, Yamaguchi H, Harada A. 2006. Selection between pinching-type and supramolecular polymer-type complexes by acyclodextrin-b-cyclodextrin hetero-dimer and hetero-cinnamamide guest dimers. J Org Chem 71:4878–4883. Takahashi N, Okada H, Fukushi E, Onodera S, Nishimoto T, Kawabata J, Shiomi N. 2005. Structural analysis of six novel oligosaccharides synthesized by glucosyl transfer from b-D-glucose 1-phosphate to raffinose and stachyose using Thermoanaerobacter brockii kojibiose phosphorylase. Tetrahedron Asym 16:57–63. Takashiba M, Chiba Y, Jigami Y. 2006. Identification of phosphorylation sites in N-linked glycans by matrix-assisted laser desorption/ionization timeof-flight mass spectrometry. Anal Chem 78:5208–5213. Takeda M, Makita H, Ohno K, Nakahara Y, Koizumi J. 2005. Structural analysis of the sheath of a sheathed bacterium, Leptothrix cholodnii. Int J Biol Macromol 37:92–98. Takemori N, Komori N, Matsumoto H. 2006. Highly sensitive multistage mass spectrometry enables small-scale analysis of protein glycosylation from two-dimensional polyacrylamide gels. Electrophoresis 27:1394– 1406. Talabnin K, Yagi H, Takahashi N, Suzuki T, Kato K, Uemura H, Saichua P, Kaewkes S, Wongkham S, Suzuki Y, Sripa B. 2006. Glycobiological study of adult Opisthorchis viverrini: Characterization of N-linked oligosaccharides. Mol Biochem Parasitol 147:230–233. Tamayo R, Choudhury B, Septer A, Merighi M, Carlson R, Gunn JS. 2005. Identification of cptA, a PmrA-regulated locus required for phosphoethanolamine modification of the Salmonella enterica serovar typhimurium lipopolysaccharide core. J Bacteriol 187:3391–3399. Tanabe K, Ikenaka K. 2006. In-column removal of hydrazine and Nacetylation of oligosaccharides released by hydrazionolysis. Anal Biochem 348:324–326. Tanaka E, Nakahara Y, Kuroda Y, Takano Y, Kojima N, Hojo H, Nakahara Y. 2006. Chemoenzymatic synthesis of a MUC1 glycopeptide carrying non-natural sialyl TF-b O-glycan. Biosci Biotechnol Biochem 70: 2515–2522. Tang H, Mechref Y, Novotny MV. 2005. Automated interpretation of MS/MS spectra of oligosaccharides. Bioinformatics 21:i431–i439. Tang S-Y, Yang S-J, Cha H, Woo E-J, Park C, Park K-H. 2006. Contribution of W229 to the transglycosylation activity of 4-a-glucanotransferase from Pyrococcus furiosus. Biochim Biophys Acta 1764:1633–1638. Taylor AM, Holst O, Thomas-Oates J. 2006. Mass spectrometric profiling of O-linked glycans released directly from glycoproteins in gels using ingel reductive b-elimination. Proteomics 6:2936–2946. ten Cate MGJ, Omerovi M, Oshovsky GV, Crego-Calama M, Reinhoudt DN. 2005. Self-assembly and stability of double rosette nanostructures with biological functionalities. Org Biomol Chem 3:3727–3733. Terada M, Khoo KH, Inoue R, Chen CI, Yamada K, Sakaguchi H, Kadowaki N, Ma BY, Oka S, Kawasaki T, Kawasaki N. 2005. Characterization of oligosaccharide ligands expressed on SW1116 cells recognized by mannan-binding protein. A highly fucosylated polylactosamine type Nglycan. J Biol Chem 280:10897–10913. Teramoto N, Abe Y, Enomoto A, Watanabe D, Shibata M. 2005. Novel synthetic route of a trehalose-based linear polymer by ring opening of Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES two epoxy groups with aliphatic diamine. Carbohydr Polym 59:217– 224. Terinek M, Vasella A. 2005. Synthesis and evaluation of two mannosaminederived lactone-type inhibitors of snail b-mannosidase. Tetrahedron Asym 16:449–469. Thaysen-Andersen M, Højrup P. 2006. Enrichment and characterization of glycopeptides from gel-separated glycoproteins. Am Biotechnol Lab 24:14–17. Tholey A, Heinzle E. 2006. Ionic (liquid) matrices for matrix-assisted laser desorption/ionization mass spectrometry-applications and perspectives. Anal Bioanal Chem 386:24–37. Thoma G, Streiff MB, Katopodis AG, Duthaler RO, Voelcker NH, Ehrhardt C, Masson C. 2006. Non-covalent polyvalent ligands by self-assembly of small glycodendrimers: A novel concept for the inhibition of polyvalent carbohydrate-protein interactions in vitro and in vivo. Chem Eur J 12:99–117. Tie J-K, Zheng M-Y, Pope RM, Straight DL, Stafford DW. 2006. Identification of the N-linked glycosylation sites of vitamin Kdependent carboxylase and effect of glycosylation on carboxylase function. Biochemistry 45:14755–14763. Tolbert TJ, Franke D, Wong C-H. 2005. A new strategy for glycoprotein synthesis: Ligation of synthetic glycopeptides with truncated proteins expressed in E. coli as TEV protease cleavable fusion protein. Bioorg Med Chem 13:909–915. Totani K, Ihara Y, Matsuo I, Koshino H, Ito Y. 2005. Synthetic substrates for an endoplasmic reticulum protein-folding sensor, UDP-glucose: Glycoprotein glucosyltransferase. Angew Chem Int Ed Engl 44: 7950–7954. Totani K, Matsuo I, Ihara Y, Ito Y. 2006. High-mannose-type glycan modifications of dihydrofolate reductase using glycan-methotrexate conjugates. Bioorg Med Chem 14:5220–5229. Touboul D, Roy S, Germain DP, Baillet A, Brion F, Prognon P, Chaminade P, Laprévote O. 2005. Fast fingerprinting by MALDI-TOF mass spectrometry of urinary sediment glycosphingolipids in Fabry disease. Anal Bioanal Chem 382:1209–1216. Tran AX, Lester ME, Stead CM, Raetz CRH, Maskell DJ, McGrath SC, Cotter RJ, Trent MS. 2005. Resistance to the antimicrobial peptide polymyxin requires myristoylation of Escherichia coli and Salmonella typhimurium lipid A. J Biol Chem 280:28186–28194. Tran AX, Whittimore JD, Wyrick PB, McGrath SC, Cotter RJ, Trent MS. 2006. The lipid A 1-phosphatase of Helicobacter pylori is required for resistance to the antimicrobial peptide polymyxin. J Bacteriol 188: 4531–4541. Tranchepain F, Deschrevel B, Courel M-N, Levasseur N, Le Cerf D, Loutelier-Bourhis C, Vincent J-C. 2006. A complete set of hyaluronan fragments obtained from hydrolysis catalyzed by hyaluronidase: Application to studies of hyaluronan mass distribution by simple HPLC devices. Anal Biochem 348:232–242. Triguero A, Cabrera G, Cremata JA, Yuen C-T, Wheeler J, Ramirez NI. 2006. Plant-derived mouse IgG monoclonal antibody fused to KDEL endoplasmic reticulum-retention signal is N-glycosylated homogeneously throughout the plant with mostly high-mannose-type N-glycans. Plant Biotechnol J 3:449–457. Trimpin S, Räder HJ, Müllen K. 2006. Investigations of theoretical principles for MALDI-MS derived from solvent-free sample preparation: Part I. Preorganization. Int J Mass Spectrom 253:13–21. Tropis M, Meniche X, Wolf A, Gebhardt H, Strelkov S, Chami M, Schomburg D, Kramer R, Morbach S, Daffe M. 2005. The crucial role of trehalose and structurally related oligosaccharides in the biosynthesis and transfer of mycolic acids in Corynebacterineae. J Biol Chem 280:26573– 26585. Turek D, Sundgren A, Lahmann M, Oscarson S. 2006. Synthesis of oligosaccharides corresponding to Vibrio cholerae O139 polysacchar- Mass Spectrometry Reviews DOI 10.1002/mas & ide structures containing dideoxy sugars and a cyclic phosphate. Org Biomol Chem 4:1236–1241. Ueki M, Yamaguchi M. 2005. Analysis of acidic carbohydrates as their quaternary ammonium or phosphonium salts by matrix-assisted laser desorption/ionization mass spectrometry. Carbohydr Res 340:1722– 1731. Uematsu R, Furukawa J-I, Nakagawa H, Shinohara Y, Deguch K, Monde K, Nishimura S-I. 2005. High throughput quantitative glycomics and glycoform-focused proteomics of murine dermis and epidermis. Mol Cell Proteomics 4:1977–1989. Uemura Y, Asakuma S, Nakamura T, Arai I, Taki M, Urashima T. 2005. Occurrence of a unique sialyl tetrasaccharide in colostrum of a bottlenose dolphin (Tursiops truncatus). Biochim Biophys Acta 1725:290–297. Ullmer R, Plematl A, Rizzi A. 2006. Derivatization by 6-aminoquinolyl-Nhydroxysuccinimidyl carbamate for enhancing the ionization yield of small peptides and glycopeptides in matrix-assisted laser desorption/ ionization and electrospray ionization mass spectrometry. Rapid Commun Mass Spectrom 20:1469–1479. Usuki S, Thompson SA, Rivner MH, Taguchi K, Shibata K, Ariga T, Yu RK. 2006. Molecular mimicry: Sensitization of Lewis rats with Campylobacter jejuni lipopolysaccharides induces formation of antibody toward GD3 ganglioside. J Neurosci Res 83:274–284. Utz S, Roditi I, Renggli CK, Almeida IC, Acosta-Serrano A, Bütikofer P. 2006. Trypanosoma congolense procyclins: Unmasking cryptic major surface glycoproteins in procyclic forms. Eukaryot Cell 5:1430–1440. Vaidyanathan G, Affleck DJ, Schottelius M, Wester H, Friedman HS, Zalutsky MR. 2006. Synthesis and evaluation of glycosylated octreotate analogues labeled with radioiodine and 211At via a tin precursor. Bioconjug Chem 17:195–203. Van Riet E, Wuhrer M, Wahyuni S, Retra K, Deelder AM, Tielens AGM, Van Der Kleij D, Yazdanbakhsh M. 2006. Antibody responses to Ascarisderived proteins and glycolipids: The role of phosphorylcholine. Parasite Immunol 28:363–371. van Roon A-MM, Aguilera B, Cuenca F, van Remoortere A, van der Marel GA, Deelder AM, Overkleeft HS, Hokke CH. 2005. Synthesis and antibody-binding studies of a series of parasite fuco-oligosaccharides. Bioorg Med Chem 13:3553–3564. Vedam V, Kannenberg E, Datta A, Brown D, Haynes-Gann JG, Sherrier DJ, Carlson RW. 2006. The pea nodule environment restores the ability of a Rhizobium leguminosarum lipopolysaccharide acpXL mutant to add 27-hydroxyoctacosanoic acid to its lipid A. J Bacteriol 188:2126– 2133. Verhagen C, Bryld T, Raunkjær M, Vogel S, Buchalová K, Wengel J. 2006. A conformationally locked aminomethyl C-glycoside and studies on its Npyren-1-ylcarbonyl derivative inserted into oligodeoxynucleotides. Eur J Org Chem:2538–2548. Verhoef R, Beldman G, Schols HA, Siika-aho M, Rättö M, Buchert J, Voragen AGJ. 2005. Characterisation of a 1,4-b-fucoside hydrolase degrading colanic acid. Carbohydr Res 340:1780–1788. Vialle S, Sepulcri P, Dubayle J, Talaga P. 2005. The teichoic acid (Cpolysaccharide) synthesized by Streptococcus pneumoniae serotype 5 has a specific structure. Carbohydr Res 340:91–96. Vila-Perelló M, Gallego R, Andreu D. 2005. A simple approach to welldefined sugar-coated surfaces for interaction studies. ChemBioChem 6:1831–1838. Vinogradov E, Caroff M. 2005. Structure of the Bordetella trematum LPS Ochain subunit. FEBS Lett 579:18–24. von der Lieth C-W, Lütteke T, Frank M. 2006. The role of informatics in glycobiology research with special emphasis on automatic interpretation of MS spectra. Biochim Biophys Acta 1760:568–577. von Witzendorff D, Ekhlasi-Hundrieser M, Dostalova Z, Resch M, Rath D, Michelmann HW, Topfer-Petersen E. 2005. Analysis of N-linked 97 & HARVEY glycans of porcine zona pellucida glycoprotein ZPA by MALDI-TOF MS: A contribution to understanding zona pellucida structure. Glycobiology 15:475–488. Vosseller K, Trinidad JC, Chalkley RJ, Specht CG, Thalhammer A, Lynn AJ, Snedecor JO, Guan S, Medzihradszky KF, Maltby DA, Schoepfer R, Burlingame AL. 2006. O-linked N-acetylglucosamine proteomics of postsynaptic density preparations using lectin weak affinity chromatography and mass spectrometry. Mol Cell Proteomics 5:923–934. Voutquenne L, Guinot P, Froissard C, Thoison O, Litaudon M, Lavaud C. 2005. Haemolytic acylated triterpenoid saponins from Harpullia austro-caledonica. Phytochemistry 66:825–835. Wa C, Cerny R, Hage DS. 2006. Obtaining high sequence coverage in matrixassisted laser desorption time-of-flight mass spectrometry for studies of protein modification: Analysis of human serum albumin as a model. Anal Biochem 349:229–241. Wacker M, Feldman MF, Callewaert N, Kowarik M, Clarke BR, Pohl NL, Hernandez M, Vines ED, Valvano MA, Whitfield C, Aebi M. 2006. Substrate specificity of bacterial oligosaccharyltransferase suggests a common transfer mechanism for the bacterial and eukaryotic systems. Proc Natl Acad Sci USA 103:7088–7093. Wacker R, Stoeva S, Betzel C, Voelter W. 2005. Complete structure determination of N-acetyl-D-galactosamine-binding mistletoe lectin-3 from Viscum album L. album. J Peptide Sci 11:289–302. Wada Y. 2006. Mass spectrometry for congenital disorders of glycosylation, CDG. J Chromatogr B 838:3–8. Wahrenbrock MG, Varki A. 2006. Multiple hepatic receptors cooperate to eliminate secretory mucins aberrantly entering the bloodstream: Are circulating cancer mucins the ‘‘tip of the iceberg’’? Cancer Res 66:2433–2441. Walter M, Wiegand M, Lindhorst TK. 2006. Synthesis of cluster mannosides carrying a photolabile diazirine group. Eur J Org Chem:719–728. Wang H-W, Liu Y-Q, Feng C-G. 2006. Isolation and identification of a novel flavonoid from Penthorum chinense P. J Asian Nat Prod Res 8:757–761. Wang J, Li J, Chen H-N, Chang H, Tanifum CT, Liu H-H, Czyryca PG, Chang C-WT. 2005a. Glycodiversification for the optimization of the kanamycin class aminoglycosides. J Med Chem 48:6271–6285. Wang J, Mou H, Jiang X, Guan H. 2006a. Characterization of a novel betaagarase from marine Alteromonas sp. SY37-12 and its degrading products. Appl Microbiol Biotechnol 71:833–839. Wang X, McGrath SC, Cotter RJ, Raetz CRH. 2006b. Expression cloning and periplasmic orientation of the Francisella novicida Lipid A 40 phosphatase LpxF. J Biol Chem 281:9321–9330. Wang X, Ribeiro AA, Guan Z, McGrath SC, Cotter RJ, Raetz CRH. 2006c. Structure and biosynthesis of free lipid A molecules that replace lipopolysaccharide in Francisella tularensis subsp. novicida. Biochemistry 45:14427–14440. Wang Y, Han F, Hu B, Li J, Yu W. 2006d. In vivo prebiotic properties of alginate oligosaccharides prepared through enzymatic hydrolysis of alginate. Nutr Res 26:597–603. Wang Y, Yan Q, Wu J, Zhang L-H, Ye X-S. 2005b. A new one-pot synthesis of a-Gal epitope derivatives involved in the hyperacute rejection response in xenotransplantation. Tetrahedron 61:4313–4321. Warabi K, Hamada T, Nakao Y, Matsunaga S, Hirota H, van Soest RWM, Fusetani N. 2005. Axinelloside A, an unprecedented highly sulfated lipopolysaccharide inhibiting telomerase, from the marine sponge, Axinella infundibula. J Am Chem Soc 127:13262–13270. Ward RE, Ninonuevo M, Mills DA, Lebrilla CB, German JB. 2006. In vitro fermentation of breast milk oligosaccharides by Bifidobacterium infantis and Lactobacillus gasseri. Appl Environ Microbiol 72:4497– 4499. Warnock D, Bai X, Autote K, Gonzales J, Kinealy K, Yan B, Qian J, Stevenson T, Zopf D, Bayer RJ. 2005. In vitro galactosylation of human IgG at 1 kg scale using recombinant galactosyltransferase. Biotechnol Bioeng 92:831–842. 98 Webber D, Radcliffe CM, Royle L, Tobiasen G, Merry AH, Rodgers AL, Sturrock ED, Wormald MR, Harvey DJ, Dwek RA, Rudd PM. 2006. Sialylation of urinary prothrombin fragment 1 is implicated as a contributory factor in the risk of calcium oxalate kidney stone formation. FASEB J 273:3024–3037. Weerapana E, Glover KJ, Chen MM, Imperiali B. 2005. Investigating bacterial N-linked glycosylation: Synthesis and glycosyl acceptor activity of the undecaprenyl pyrophosphate-linked bacillosamine. J Am Chem Soc 127:13766–13767. Wei L, Wei G, Zhang H, Wang PG, Du Y. 2005a. Synthesis of new, potent avermectin-like insecticidal agents. Carbohydr Res 340:1583– 1590. Wei Y, Yen TY, Cai J, Trent JO, Pierce WM, Young WW. 2005b. Structural features of the lysosomal hydrolase mannose 6-phosphate uncovering enzyme. Glycoconj J 22:13–19. Weimer PJ, Price NPJ, Kroukamp O, Joubert L-M, Wolfaardt GM, Van Zyl WH. 2006. Studies of the extracellular glycocalyx of the anaerobic cellulolytic bacterium Ruminococcus albus 7. Appl Environ Microbiol 72:7559–7566. Westerlind U, Norberg T. 2006. Chemical synthesis of analogs of the glycopeptide contulakin-G, an analgetically active conopeptide from Conus geographus. Carbohydr Res 341:9–18. Wilson JC, Hitchen PG, Frank M, Peak IR, Collins PM, Morris HR, Dell A, Grice ID. 2005. Identification of a capsular polysaccharide from Moraxella bovis. Carbohydr Res 340:765–769. Wolfenden ML, Cloninger MJ. 2005. Mannose/glucose-functionalized dendrimers to investigate the predictable tunability of multivalent interactions. J Am Chem Soc 127:12168–12169. Wolfenden ML, Cloninger MJ. 2006. Carbohydrate-functionalized dendrimers to investigate the predictable tunability of multivalent interactions. Bioconjug Chem 17:958–966. Wong C-H. 2005. Protein glycosylation: New challenges and opportunities. J Org Chem 70:4219–4225. Wong NSC, Yap MGS, Wang DIC. 2006. Enhancing recombinant glycoprotein sialylation through CMP-sialic acid transporter over expression in Chinese hamster ovary cells. Biotechnol Bioeng 93: 1005–1016. Woosley B, Xie M, Wells L, Orlando R, Garrison D, King D, Bergmann C. 2006a. Comprehensive glycan analysis of recombinant Aspergillus niger endo-polygalacturonase C. Anal Biochem 354:43– 53. Woosley BD, Kim YH, Kolli VSK, Wells L, King D, Poe R, Orlando R, Bergmann C. 2006b. Glycan analysis of recombinant Aspergillus niger endo-polygalacturonase A. Carbohydr Res 341:2370–2378. Wopereis S, Morava E, Grünewald S, Mills PB, Winchester BG, Clayton P, Coucke P, Huijben KMLC, Wevers RA. 2005. A combined defect in the biosynthesis of N- and O-glycans in patients with cutis laxa and neurological involvement: The biochemical characteristics. Biochim Biophys Acta 1741:156–164. Wu P, Malkoch M, Hunt JN, Vestberg R, Kaltgrad E, Finn MG, Fokin VV, Sharpless BS, Hawker CJ. 2005. Multivalent, bifunctional dendrimers prepared by click chemistry. Chem Commun:5775–5777. Wu X, Bundle DR. 2005. Synthesis of glycoconjugate vaccines for Candida albicans using novel linker methodology. J Org Chem 70:7381– 7388. Wuhrer M, Balog CIA, Catalina MI, Jones FM, Schramm G, Haas H, Doenhoff MJ, Dunne DW, Deelder AM, Hokke CH. 2006a. IPSE/alpha1, a major secretory glycoprotein antigen from schistosome eggs, expresses the Lewis X motif on core-difucosylated N-glycans. FEBS J 273:2276–2292. Wuhrer M, Balog CIA, Koeleman CAM, Deelder AM, Hokke CH. 2005. New features of site-specific horseradish peroxidase (HRP) glycosylation uncovered by nano-LC-MS with repeated ion-isolation/fragmentation cycles. Biochim Biophys Acta 1723:229–239. Mass Spectrometry Reviews DOI 10.1002/mas ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES Wuhrer M, Deelder AM. 2005. Negative-mode MALDI-TOF/TOF-MS of oligosaccharides labeled with 2-aminobenzamide. Anal Chem 77:6954–6959. Wuhrer M, Deelder AM. 2006. Matrix-assisted laser desorption/ionization insource decay combined with tandem time-of-flight mass spectrometry of permethylated oligosaccharides: Targeted characterization of specific parts of the glycan structure. Rapid Commun Mass Spectrom 20:943–951. Wuhrer M, Koeleman CA, Deelder AM, Hokke CH. 2006b. Repeats of LacdiNAc and fucosylated LacdiNAc on N-glycans of the human parasite Schistosoma mansoni. FEBS J 273:347–361. Wuhrer M, Koeleman CA, Hokke CH, Deelder AM. 2006c. Mass spectrometry of proton adducts of fucosylated N-glycans: Fucose transfer between antennae gives rise to misleading fragments. Rapid Commun Mass Spectrom 20:1747–1754. Wuhrer M, Koeleman CAM, Fitzpatrick JM, Hoffmann KF, Deelder AD, Hokke CH. 2006d. Gender-specific expression of complex-type Nglycans in schistosomes. Glycobiology 16:991–1006. Wyatt MF, Stein BK, Brenton AG. 2006. Characterization of various analytes using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and 2-[(2E)-3-(4-tert-butylphenyl)-2-methylprop-2-enylidene]malononitrile matrix. Anal Chem 78:199–206. Xia B, Kawar ZS, Ju T, Alvarez RA, Sachdev GP, Cummings RD. 2005a. Versatile fluorescent derivatization of glycans for glycomic analysis. Nat Methods 2:845–850. Xia B, Royall JA, Damera G, Sachdev GP, Cummings RD. 2005b. Altered Oglycosylation and sulfation of airway mucins associated with cystic fibrosis. Glycobiology 15:747–775. Xiao Z, Prieto D, Conrads TP, Veenstra TD, Issaq HJ. 2005. Proteomic patterns: Their potential for disease diagnosis. Mol Cell Endocrinol 230:95–106. Xie B, Zhou G, Chan S-Y, Shapiro E, Kong X-P, Wu X-R, Sun T-T, Costello CE. 2006. Distinct glycan structures of uroplakins Ia and Ib: Structural basis for the selective binding of FimH adhesin to uroplakin Ia. J Biol Chem 281:14644–14653. Xing G-W, Wu D, Poles MA, Horowitz A, Tsuji M, Ho DD, Wong C-H. 2005. Synthesis and human NKT cell stimulating properties of 3-O-sulfo-a/bgalactosylceramides. Bioorg Med Chem 13:2907–2916. Xu S, Li Y, Zou H, Qiu J, Guo Z, Guo B. 2003. Carbon nanotubes as assisted matrix for laser desorption/ionization time-of-flight mass spectrometry. Anal Chem 75:6191–6195. Xue J, Zhu J, Marchant RE, Guo Z. 2005. Pentaerythritol as the core of multivalent glycolipids: Synthesis of a glycolipid with three SO3Lea ligands. Org Lett 7:3753–3756. Yagi H, Takahashi N, Yamaguchi Y, Kimura N, Uchimura K, Kannagi R, Kato K. 2005. Development of structural analysis of sulfated N-glycans by multidimensional high performance liquid chromatography mapping methods. Glycobiology 15:1051–1060. Yamagaki T. 2005. Development of structure analysis method of isomeric oligosaccharides by MALDI-TOF mass spectrometry. Bunseki Kagaku 54:983–990. Yamagaki T, Fukui K, Tachibana K. 2006. Analysis of glycosyl bond cleavage and related isotope effects in collision-induced dissociation quadrupole-time-of-flight mass spectrometry of isomeric trehaloses. Anal Chem 78:1015–1022. Yamagaki T, Suzuki H, Tachibana K. 2005. In-source and postsource decay in negative-ion matrix-assisted laser desorption/ionization time-of-flight mass spectrometry of neutral oligosaccharides. Anal Chem 77:1701– 1707. Yamagaki T, Suzuki H, Tachibana K. 2006a. A comparative study of the fragmentation of neutral lactooligosaccharides in negative-ion mode by UV-MALDI-TOF and UV-MALDI ion-trap/TOF mass spectrometry. J Am Soc Mass Spectrom 17:67–74. Mass Spectrometry Reviews DOI 10.1002/mas & Yamagaki T, Suzuki H, Tachibana K. 2006b. Semiquantitative analysis of isomeric oligosaccharides by negative-ion mode UV-MALDI TOF postsource decay mass spectrometry and their fragmentation mechanism study at N-acetyl hexosamine moiety. J Mass Spectrom 41:454– 462. Yamagaki T, Suzuki H, Tachibana K. 2006c. Study of negative-ion MALDIMS of neutral oligosaccharides I: Linkage isomers’ analyses by postsource and in-source decay measurements. J Mass Spectrom Soc Jpn 54:141–149. Yamaguchi M, Kojima K, Hayashi N, Kakizaki I, Kon A, Takagaki K. 2006. Efficient and widely applicable method of constructing neo-proteoglycan utilizing copper(I) catalyzed 1,3-dipolar cycloaddition. Tetrahedron Lett 47:7455–7458. Yamamoto N, Takayanagi A, Sakakibara T, Dawson PE, Kajihara Y. 2006. Highly efficient synthesis of sialylglycopeptides overcoming unexpected aspartimide formation during activation of FmocAsn(undecadisialyloligosaccharide)-OH. Tetrahedron Lett 47:1341– 1346. Yamamoto S, Muramatsu H, Muramatsu T. 2005. Mutational studies on endob-N-acetylglucosaminidase D which hydrolyzes core portion of asparagine-linked complex type oligosaccharides. Glycoconj J 22: 35–42. Yamanoi T, Yoshida N, Oda Y, Akaike E, Tsutsumida M, Kobayashi N, Osumi K, Yamamoto K, Fujita K, Takahashi K, Hattori K. 2005. Synthesis of mono-glucose-branched cyclodextrins with a high inclusion ability for doxorubicin and their efficient glycosylation using Mucor hiemalis endo-b-N-acetylglucosaminidase. Bioorg Med Chem Lett 15:1009– 1013. Yang Y-L, Yang F-L, Jao S-C, Chen M-Y, Tsay S-S, Zou W, Wu S-H. 2006. Structural elucidation of phosphoglycolipids from strains of the bacterial thermophiles Thermus and Meiothermus. J Lipid Res 47: 1823–1832. Yang Z, Wong EL-M, Shum TY-T, Che C-M, Hui Y. 2005. Fluorophoreappended steroidal saponin (dioscin and polyphyllin D) derivatives. Org Lett 7:669–672. Yaoi K, Kondo H, Noro N, Suzuki M, Tsuda S, Mitsuishi Y. 2005a. Functions and structures of xyloglucan hydrolyases belonging to glycoside hydrolyse family 74. J Appl Glycosci 52:169–176. Yaoi K, Nakai T, Kameda Y, Hiyoshi A, Mitsuishi Y. 2005b. Cloning and characterization of two xyloglucanases from Paenibacillus sp. strain KM21. Appl Environ Microbiol 71:7670–7678. Yashunsky DV, Borodkin VS, Ferguson MAJ, Nikolaev AV. 2006. The chemical synthesis of bioactive glycosylphosphatidylinositols from Trypanosoma cruzi containing an unsaturated fatty acid in the lipid. Angew Chem Int Ed Engl 45:468–474. Yasuda J, Eguchi H, Fujiwara N, Ookawara T, Kojima S, Yamaguchi Y, Nishimura M, Fujimoto J, Suzuki K. 2006. Reactive oxygen species modify oligosaccharides of glycoproteins in vivo: A study of a spontaneous acute hepatitis model rat (LEC rat). Biochem Biophys Res Commun 342:127–134. Ye X-S, Sun F, Liu M, Li Q, Wang Y, Zhang G, Zhang L-H, Zhang X-L. 2005. Synthetic iminosugar derivatives as new potential immunosuppressive agents. J Med Chem 48:3688–3691. Yeager AR, Finney NS. 2005. Synthesis of fluorescently labeled UDPGlcNAc analogues and their evaluation as chitin synthase substrates. J Org Chem 70:1269–1275. Ying L, Liu R, Zhang J, Lam K, Lebrilla CB, Gervay-Hague J. 2005. A topologically segregated one-bead-one-compound combinatorial glycopeptide library for identification of lectin ligands. J Comb Chem 7:372–384. Yonezawa N, Kudo K, Terauchi H, Kanai S, Yoda N, Tanokura M, Ito K, Miura K, Katsumata T, Nakano M. 2005. Recombinant porcine zona pellucida glycoproteins expressed in Sf9 cells bind to 99 & HARVEY bovine sperm but not to porcine sperm. J Biol Chem 280:20189– 20196. Yoon SJ, Nakayama K-I, Takahashi N, Yagi H, Utkina N, Wang HY, Kato K, Sadilek M, Hakomori S-I. 2006. Interaction of N-linked glycans, having multivalent GlcNAc termini, with GM3 ganglioside. Glycoconj J 23:639–649. Yoshida N, Takatsuka K, Katsuragi T, Tani Y. 2005. Occurrence of fructosylamino acid oxidase-reactive compounds in fungal cells. Biosci Biotechnol Biochem 69:258–260. Yu B, Cong H, Liu H, Li Y, Liu F. 2005a. Ionene-dynamically coated capillary for analysis of urinary and recombinant human erythropoietin by capillary electrophoresis and online electrospray ionization mass spectrometry. J Sep Sci 28:2390–2400. Yu F, Prestegard JH. 2006. Structural monitoring of oligosaccharides through 13 C enrichment and NMR observation of acetyl groups. Biophys J 91:1952–1959. Yu H, Teramoto A, Fukudome M, Xie R-G, Yuan D-Q, Fujita K. 2006. A facile sulfonylation method enabling direct syntheses of per(2-Osulfonyl)-b-cyclodextrins. Tetrahedron Lett 47:8837–8840. Yu SY, Wu SW, Khoo KH. 2006. Distinctive characteristics of MALDI-Q/ TOF and TOF/TOF tandem mass spectrometry for sequencing of permethylated complex type N-glycans. Glycoconj J 23:355–369. Yu YG, Gilar M, Kaska J, Gebler JC. 2005b. Deglycosylation and sample cleanup method for mass spectrometry analysis of N-linked glycans. LC GC North America:23–25. Yu YQ, Gilar M, Kaska J, Gebler JC. 2005c. A rapid sample preparation method for mass spectrometric characterization of N-linked glycans. Rapid Commun Mass Spectrom 19:2331–2336. Yurkova I, Kisel M, Arnhold J, Shadyro O. 2005. Free-radical fragmentation of galactocerebrosides: A MALDI-TOF mass spectrometry study. Chem Phys Lipids 134:41–49. Zaliz CLR, Erra-Balsells R, Nonami H, Sato Y, Varela O. 2005. Synthesis and polymerization of conveniently substituted 6-amino-6-deoxy-D-galactonic acid derivatives. Arkivoc:76–87. Zaliz CLR, Varela O. 2006. Facile synthesis of a D-galactono-1,6-lactone derivative, a precursor of a copolyester. Carbohydr Res 341:2973– 2977. Zandleven J, Beldman G, Bosveld M, Benen J, Voragen A. 2006a. Mode of action of xylogalacturonan hydrolase towards xylogalacturonan and xylogalacturonan oligosaccharides. Biochem J 387:719–725. Zandleven J, Beldman G, Bosveld M, Schols HA, Voragen AGJ. 2006b. Enzymatic degradation studies of xylogalacturonans from apple and potato, using xylogalacturonan hydrolase. Carbohydr Polym 65:495–503. Zehl M, Pittenauer E, Rizzi A, Allmaier G. 2006. Characterization of moenomycin antibiotic complex by multistage MALDI-IT/RTOF-MS and ESI-IT-MS. J Am Soc Mass Spectrom 17:1081–1090. Zeleny R, Leonard R, Dorfner G, Dalik T, Kolarich D, Altmann F. 2006. Molecular cloning and characterization of a plant a,3/4-fucosidase based on sequence tags from almond fucosidase I. Phytochemistry 67:641–648. Zhang G, Fu M, Ning J. 2005a. First synthesis of 5,6-branched galactohexasaccharide, the dimer of the trisaccharide repeating unit of the cellwall galactans of Bifidobacterium catenulatum YIT 4016. Tetrahedron Asym 16:733–738. Zhang G, Fu M, Ning J. 2005b. Synthesis of galactose-containing analogues of (1-6)-branched (1-3)-glucohexaose and its lauryl glycoside. Carbohydr Res 340:597–602. Zhang H, Singh S, Reinhold VN. 2005. Congruent strategies for carbohydrate sequencing. 2. FragLib: An MSn spectral library. Anal Chem 77:6263– 6270. Zhang J, LaMotte L, Dodds ED, Lebrilla CB. 2005c. Atmospheric pressure MALDI Fourier transform mass spectrometry of labile oligosaccharides. Anal Chem 77:4429–4438. 100 Zhang J, Schubothe K, Li B, Russell S, Lebrilla CB. 2005d. Infrared multiphoton dissociation of O-linked mucin-type oligosaccharides. Anal Chem 77:208–214. Zhang M, Shi Z, Bai Y, Gao Y, Hu R, Zhao F. 2006. Using molecular recognition of b-cyclodextrin to determine molecular weights of lowmolecular-weight explosives by MALDI-TOF mass spectrometry. J Am Soc Mass Spectrom 17:189–193. Zhao J, Simeone DM, Heidt D, Anderson MA, Lubman DM. 2006. Comparative serum glycoproteomics using lectin selected sialic acid glycoproteins with mass spectrometric analysis: Application to pancreatic cancer serum. J Proteome Res 5:1792–1802. Zhao W, Kong F. 2005. Facile synthesis of the heptasaccharide repeating unit of O-deacetylated GXM of C. neoformans serotype B. Bioorg Med Chem 13:121–130. Zheng W, Kollmeyer J, Symolon H, Momin A, Munter E, Wang E, Kelly S, Allegood JC, Liu Y, Peng Q, Ramaraju H, Sullards MC, Cabot M, Merrill AHJ. 2006. Ceramides and other bioactive sphingolipid backbones in health and disease: Lipidomic analysis, metabolism and roles in membrane structure, dynamics, signaling and autophagy. Biochim Biophys Acta 1758:1864–1884. Zheng X, Wu S-L, Hancock WS. 2006. Glycation of interferon-beta-1b and human serum albumin in a lyophilized glucose formulation: Part III: Application of proteomic analysis to the manufacture of biological drugs. Int J Pharm 322:136–145. Zhong R, Peña MJ, Zhou G-K, Nairn CJ, Wood-Jones A, Richardson EA, Morrison WH III, Darvill AG, York WS, Ye Z-H. 2005. Arabidopsis Fragile Fiber8, which encodes a putative glucuronyltransferase, is essential for normal secondary wall synthesis. Plant Cell 17:3390–3408. Zhou Q, Kyazike J, Echelard Y, Meade HM, Higgins E, Cole ES, Edmunds T. 2005. Effect of genetic background on glycosylation heterogeneity in human antithrombin produced in the mammary gland of transgenic goats. J Biotechnol 117:57–72. Zhu J, Marchant RE. 2006. Dendritic saccharide surfactant polymers as antifouling interface materials to reduce platelet adhesion. Biomacromolecules 7:1036–1041. Zhu J, Yan F, Guo Z, Marchant RE. 2005a. Surface modification of liposomes by saccharides: Vesicle size and stability of lactosyl liposomes studied by photon correlation spectroscopy. J Colloid Interface Sci 289:542–550. Zhu L, van de Lavoir M-C, Albanese J, Beenhouwer DO, Cardarelli PM, Cuison S, Deng DF, Deshpande S, Diamond JH, Green L, Halk EL, Heyer BS, Kay RM, Kerchner A, Leighton PA, Mather CM, Morrison SL, Nikolov ZL, Passmore DB, Pradas-Monne A, Preston BT, Rangan VS, Shi M, Srinivasan M, White SG, Winters-Digiacinto P, Wong S, Zhou W, Etches RJ. 2005b. Production of human monoclonal antibody in eggs of chimeric chickens. Nat Biotechnol 23:1159–1169. Zhu P, Boykins RA, Tsai C-M. 2006. Genetic and functional analyses of the IgtH gene, a member of the b-1,4-galactosyltransferase gene family in the genus Neisseria. Microbiology 152:123–134. Zhu S, Shimokawa S, Shoyama Y, Tanaka H. 2006a. A novel analytical ELISA-based methodology for pharmacologically active saikosaponins. Fitoterapia 77:100–108. Zhu S, Zhang Y, Li M, Yu J, Zhang L, Li Y, Yu B. 2006b. Synthesis and cytotoxicities of dioscin derivatives with decorated chacotriosyl residues. Bioorg Med Chem Lett 16:5629–5632. Zhu X, Kawatkar S, Rao Y, Geert-Jan Boons G-J. 2006c. Practical approach for the stereoselective introduction of b-arabinofuranosides. J Am Chem Soc 128:11948–11957. Ziegler T, Schips C. 2006. An efficient Mitsunobu protocol for the one-pot synthesis of S-glycosyl amino-acid building blocks and their use in combinatorial spot synthesis of glycopeptide libraries. Nat Protoc 1:1987–1994. Zou K, Tong W-Y, Liang H, Cui J-R, Tu G-Z, Zhao Y-Y, Zhang R-Y. 2005. Diastereoisomeric saponins from Albizia julibrissin. Carbohydr Res 340:1329–1334. Mass Spectrometry Reviews DOI 10.1002/mas