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Oxidation of benzoin with anchored vanadyl and
Oxidation of benzoin with anchored vanadyl and

... carried out in the absence of catalyst, was very slow and low yields of benzil were obtained even when the reaction was allowed to proceed for a longer time (up to 32 h). Experiments were carried out using (i) the organic polymer without ligand and metal complex and (ii) the organic polymer function ...
lucr_2_georgescu BT
lucr_2_georgescu BT

... McGUIRE and POPPIE [3], Australia first reported SCID in Arabian foals in 1973. In 1980, PERRYMAN and TORBECK [5] showed that SCID in Arabian horses was inherited as an autosomal recessive condition, which means that one copy of the disease gene is inherited from a carrier stallion and another from ...
Acid CleavageLDeprotection in Fmoc/tBu Solid
Acid CleavageLDeprotection in Fmoc/tBu Solid

... During the cleavage step, highly reactive species (tBu-cations and tButrifluoroacetate, among others) are generated that can undergo undesired side reactions with sensitive amino acids, such as Cys, Met, Trp, and Tyr. These reactive species have to be trapped chemically by the addition of appropriat ...
Engineering carbonic anhydrase for highly selective ester hydrolysis Gunnar Höst
Engineering carbonic anhydrase for highly selective ester hydrolysis Gunnar Höst

... sequence of amino acids, and the form is achieved through the protein folding process. The native form of the protein must be accessible by folding of the unfolded polypeptide chain and sufficiently stable once formed. This places restrictions on the possible sequences, so that only a small subset o ...
Current Awareness Of Issues Related To Genetically Modified Food
Current Awareness Of Issues Related To Genetically Modified Food

... are no viruses or bacteria known to infect chloroplasts that could be used as a vector for gene transfer. With biolistics, tungsten or gold particles coated with DNA are shot through the chloroplast envelope by a helium powered gun. In a successful transformation event the DNA is deposited in a chlo ...
A Sunflower Helianthinin Gene Upstream Sequence
A Sunflower Helianthinin Gene Upstream Sequence

... (compare lanes 2 and 3). These results indicate that the tested helianthinin and phaseolin upstream DNA sequences bind the same (or very similar) sunflower nuclear proteins. From comparisons of the results of converse competition experiments (Figures 3A and 3B) and results of additional experiments ...
Effects of Protein-Deprivation on the Regeneration of Rat Liver after
Effects of Protein-Deprivation on the Regeneration of Rat Liver after

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B3a Worksheet 3: DNA

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Next-Generation Sequencing applied to aDNA
Next-Generation Sequencing applied to aDNA

... The first line specifies that the name of this project is “Przewalski”. This means that all resulting files will start with “Przewalski”. The second line defines the sample name; this is used to tag the resulting alignments data, and is typically the same as the project name. The third line names a ...
Clinical and Molecular Aspects of Diseases of Mitochondrial DNA
Clinical and Molecular Aspects of Diseases of Mitochondrial DNA

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understanding genetic research - Alternating Hemiplegia of
understanding genetic research - Alternating Hemiplegia of

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File - Mr. Shanks` Class
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Advantages of racemic DNA crystallography

... primarily in space groups in which it is easiest to achieve connectivity. The strong tendency of racemic mixtures to yield racemic crystals can be exploited to overcome this difficulty, as racemates increase the chances of crystallization by allowing molecular contacts to be formed in a greater numb ...
enzymes lecture 1
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the human genofe
the human genofe

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Infectious salmon anemia virus (Canadian)

... Positive control For copy number determination and as a positive control for the PCR set up, the kit contains a positive control template. This can be used to generate a standard curve of ISAV-CA copy number / Cq value. Alternatively the positive control can be used at a single dilution where full q ...
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... the structure and parts of cells to change the organism. It begins with the atom. Molecular biotechnology often changes the physical appearance of an organism. In some cases, undesirable traits may develop along with those that are desired. ...
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... – Var(A), the additive genetic variance (the variance of that part of trait value that a parent passes along to its offspring) – Var(P), the total phenotypic (trait) variance – h2 = Var(A)/Var(P) ...
Divergent evolution of lifespan associated with mitochondrial DNA
Divergent evolution of lifespan associated with mitochondrial DNA

... respectively. These beetles have shown a dramatic evolutionary response to this divergent selection regime: detailed survival analyses have shown that beetles from the E lines now age about twice as rapidly and live for about half as long as do beetles from the L lines, and these differences apply t ...
Biotechnology Explorer - Bio-Rad
Biotechnology Explorer - Bio-Rad

... your country’s legislative authorities for proper guidelines. The Escherichia coli bacteria HB101 K-12 strain contained in this kit is not a pathogenic organism like the E. coli strain O157 H7 that has sometimes been implicated in food poisoning. HB101 K-12 has been genetically modified to prevent i ...
Natural Transfer of Conjugative Transposon Tn916 between Gram
Natural Transfer of Conjugative Transposon Tn916 between Gram

... shown to mediate a conjugal transfer from Escherichia coli to a variety of gram-positive genera (25, 31, 41). These plasmids had been constructed by combining origins of replication from pBR322, pAM,1, pIJ101, and pACYC184 with the origin of transfer of the IncP plasmids RK2 and RP4. Natural transmi ...
Genomic imprinting and human disease
Genomic imprinting and human disease

... Mammalian genomic imprinting is an epigenetic marking phenomenon leading to mono-allelic expression of a subset of genes [1]. Mono-allelic expression depends entirely on the parental origin of the gene. Thus some imprinted genes are expressed only from the maternally inherited allele, whereas others ...
Design, Synthesis, Biological Activity and Molecular Dynamics
Design, Synthesis, Biological Activity and Molecular Dynamics

... the negative regulation of the insulin signaling pathway and a valid potential drug target for the treatment of type 2 diabetes and other associated metabolic syndromes [5,6]. It acts by dephosphorylation of specific phosphotyrosine (pTyr) residues on the insulin receptor and insulin receptor substr ...
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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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