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A novel assay method for an amino acid racemase reaction based
A novel assay method for an amino acid racemase reaction based

... when the ALR activity from D-CS-producing S. lavendulae was measured [22]. It is significant that D-CS inhibits the catalytic activity of D-amino acid oxidase, which is contained in the reaction mixture for the enzyme-coupled assay [29]. These observations made it possible to develop another method ...
Answers to Scoring in Scrabble (English Word Play)
Answers to Scoring in Scrabble (English Word Play)

... the .{3} specifies the intervening codon. To allow some but not all amino acids to occupy this “lysine rich region” we would have to write the regex for each one allowed and separate them with the OR symbol | called “pipe”. (11d) Why might a researcher be interested in looking for secondary structur ...
Sequence Analysis - Missouri State University
Sequence Analysis - Missouri State University

Sequence-Specific Deoxyribonucleic Acid (DNA) Recognition by
Sequence-Specific Deoxyribonucleic Acid (DNA) Recognition by

... The first helix in the core DBD of SF1 docks into the major groove of the DNA and serves as the primary recognition module for the atypical HRE in the SBS. The FTZ-F1 box provides a secondary recognition element by crossing over to the minor groove and engaging the sequence immediately 5! to the HRE ...
Mechanisms of fast and stringent search in homologous pairing of
Mechanisms of fast and stringent search in homologous pairing of

... PH, and shear force, suggesting that it may serve as the ‘default’ mode of chromosome pairing in vivo [2]. Various models have been proposed to explain the homology-dependent attraction between dsDNA molecules [9–11], many of which attribute this interaction to hydrophobic forces or electrostatics. ...
ChromaTide ® Labeled Nucleotides
ChromaTide ® Labeled Nucleotides

... nucleic acid probes via standard techniques for molecular biology and molecular cytogenetics applications (see Table 1). Probes made with labeled nucleotides can be used for multicolor techniques such as in situ hybridization and hybridization to arrays.1-5 Biotin- or DNP-labeled nucleic acid probes ...
Purine and pyrimidi..
Purine and pyrimidi..

... converted into xanthine and finally into uric acid as in the next slide. Most of uric acid is excreted by the kidney. The remaining uric acid travels through the intestines, where bacteria help break it down. Normally these actions keep the level of uric acid in the blood plasma at a healthy level, ...
PDF - Science Advances
PDF - Science Advances

... subcloned to pBluescript II SK+ (Agilent). Digoxygenin-labeled antisense prmt8b riboprobe was generated by transcription with T7 RNA polymerase (Promega). Whole-mount in situ hybridization was performed as described previously (47) except hybridization was at 65°C. For detection, NBT/BCIP (Roche) wa ...
Some Mathematical Models in Evolutionary Genetics
Some Mathematical Models in Evolutionary Genetics

... Although it was argued convincingly that this statement has been misinterpreted for many decades (see Ewens’ chapter), the ‘classical’ interpretation has led to deep insights into the evolutionary process. Fisher’s Fundamental Theorem not only implies that evolution is impossible in the absence of g ...
SEC62 Encodes a Putative Membrane Protein Required for Protein
SEC62 Encodes a Putative Membrane Protein Required for Protein

... hydrophilic domains on the cytoplasmic surface of the ER membrane. The last 30 amino acids of the COOH terminus may form an a-helix with 14 lysine and arginine residues arranged uniformly about the helix. This domain may allow Sec62p to interact with other proteins of the putative translocation comp ...
Applied Microbiology and Biotechnology
Applied Microbiology and Biotechnology

... negative cells (Gregersen 1978) and stained using the Difco kit. Spore formation was tested with a suspension (in 0.9% NaCl) of cells grown on Nutrient Agar at 45°C and heat-treated for 15 min at 85°C (Claus and Berkeley 1986). Tests for acid formation from fructose and mannitol (10 g/l) were perfor ...
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NIH Public Access
NIH Public Access

Functional Divergence of the Nuclear Receptor NR2C1
Functional Divergence of the Nuclear Receptor NR2C1

... A superfamily of transcription factors called the nuclear receptors (NRs) are attractive candidates for a combined evolutionary and functional investigation of hominids (e.g., the clade that includes modern great apes and their last common ancestors). As transcription factors, NRs control many aspe ...
Supplemental File: Detailed Clinical Description, Sequencing
Supplemental File: Detailed Clinical Description, Sequencing

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Dehydrogenase in Saccharomyces cerevisiae
Dehydrogenase in Saccharomyces cerevisiae

... In the region 5’-distal to the LPDl sequence are two potential open reading frames: one (at -571), which would be read in the opposite sense, is capable of encoding a polypeptide of 77 residues; the other (sequence not complete, terminating at - 858) could encode a polypeptide of at least 76 amino a ...
Dehydrogenase in Saccharomyces cerevisiae
Dehydrogenase in Saccharomyces cerevisiae

... In the region 5’-distal to the LPDl sequence are two potential open reading frames: one (at -571), which would be read in the opposite sense, is capable of encoding a polypeptide of 77 residues; the other (sequence not complete, terminating at - 858) could encode a polypeptide of at least 76 amino a ...
Isolation and characterization of an RNA that binds with high affinity
Isolation and characterization of an RNA that binds with high affinity

... cells that were infected by HIV (Harrison et al., 1992). Combinations of these strategies (for example, a ribozyme and a decoy) have also been examined (Yuyama et al., 1994; Yamada et al., 1996). Although the expression and regulation of such therapeutic molecules might be possible in vivo, their co ...
Nanopore Unzipping of Individual DNA Hairpin Molecules
Nanopore Unzipping of Individual DNA Hairpin Molecules

... DNA unzipping is highly desirable. To enable nanopore measurements with time-dependent electric fields, we have recently developed a method that allows us to rapidly change the electric field applied across the nanopore during the passage of the polynucleotide (Bates et al., 2003). In this report we a ...
FREE Sample Here - Test bank Store
FREE Sample Here - Test bank Store

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Excited state behaviour of substituted dipyridophenazine Cr(III)
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... of their extraordinary excited state photophysical properties which can be potentially exploited for applications such as solar energy converters and optoelectronics,1–3 molecular light switches4–6 and phototherapeutic agents.7–9 d6 complexes such as those of ruthenium(II) or rhenium(I) have been ex ...
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AdebamboKF_0310_eps

... The untiring support of my supervisor Dr. Nicola Howarth morally, academically and socially, gave me the necessary energy needed to complete my PhD work without any problem. I am very grateful for her honesty, hospitality, and willingness to help at anytime. I acknowledge the support of the technica ...
Enzyme
Enzyme

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Lecture 6 - U of L Class Index
Lecture 6 - U of L Class Index

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Deoxyribozyme



Deoxyribozymes, also called DNA enzymes, DNAzymes, or catalytic DNA, are DNA oligonucleotides that are capable of catalyzing specific chemical reactions, similar to the action of other biological enzymes, such as proteins or ribozymes (enzymes composed of RNA).However, in contrast to the abundance of protein enzymes in biological systems and the discovery of biological ribozymes in the 1980s,there are no known naturally occurring deoxyribozymes.Deoxyribozymes should not be confused with DNA aptamers which are oligonucleotides that selectively bind a target ligand, but do not catalyze a subsequent chemical reaction.With the exception of ribozymes, nucleic acid molecules within cells primarily serve as storage of genetic information due to its ability to form complementary base pairs, which allows for high-fidelity copying and transfer of genetic information. In contrast, nucleic acid molecules are more limited in their catalytic ability, in comparison to protein enzymes, to just three types of interactions: hydrogen bonding, pi stacking, and metal-ion coordination. This is due to the limited number of functional groups of the nucleic acid monomers: while proteins are built from up to twenty different amino acids with various functional groups, nucleic acids are built from just four chemically similar nucleobases. In addition, DNA lacks the 2'-hydroxyl group found in RNA which limits the catalytic competency of deoxyribozymes even in comparison to ribozymes.In addition to the inherent inferiority of DNA catalytic activity, the apparent lack of naturally occurring deoxyribozymes may also be due to the primarily double-stranded conformation of DNA in biological systems which would limit its physical flexibility and ability to form tertiary structures, and so would drastically limit the ability of double-stranded DNA to act as a catalyst; though there are a few known instances of biological single-stranded DNA such as multicopy single-stranded DNA (msDNA), certain viral genomes, and the replication fork formed during DNA replication. Further structural differences between DNA and RNA may also play a role in the lack of biological deoxyribozymes, such as the additional methyl group of the DNA base thymidine compared to the RNA base uracil or the tendency of DNA to adopt the B-form helix while RNA tends to adopt the A-form helix. However, it has also been shown that DNA can form structures that RNA cannot, which suggests that, though there are differences in structures that each can form, neither is inherently more or less catalytic due to their possible structural motifs.
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