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... documented in areas where substantial DIN concentrations were measured, including coastal waters (Grosse et al., 2010; Mulholland et al., 2012), the Pacific Ocean (Moisander et al., 2010), and the eastern tropical Atlantic Ocean (Voss et al., 2004). In addition, models suggest that N2 fixation may o ...
Knackstedt, K.A., H.B. Thorpe, C.R. Santangelo, M.A. Balinski, and R
Knackstedt, K.A., H.B. Thorpe, C.R. Santangelo, M.A. Balinski, and R

... reports. The availability of multiple inbred strains for class use will increase the likelihood that some students will select two strains with different mean values for the assayed trait. The lab can also be made incrementally more complex at the discretion of the instructor with respect to genetic ...
The Art of Multiple Sequence Alignment in R - decipher
The Art of Multiple Sequence Alignment in R - decipher

... maximize scoring metrics in order to accomplish a combination of both structural alignment and evolutionary alignment. The idea is to give the alignment a biological basis even though the molecules that the sequences represent will never meet each other and align under any natural circumstance. The ...
Method of Analysis for Feed Enzymes: Methodological Problems?
Method of Analysis for Feed Enzymes: Methodological Problems?

... xylanase on arabinoxylan, an amylase on starch, a proteinase on protein) even in the presence of other reactants. Furthermore, the substrate needs to be of a defined quality. For example, similar results are obtained from xylanase with xylan substrates extracted from birchwood or from wheat (Table 1 ...
N-Terminal Intramolecularly Conserved Histidines of Three Domains
N-Terminal Intramolecularly Conserved Histidines of Three Domains

... shown in Figure 2. Both the full-length protein and the one with the 90 N-terminal residues removed (D1,2,391-1241) exhibited a type A pH-activity profile (Figure 2A). Peptides encompassing complete individual domains (D192-486, D2489-862, and D3791-1241) also exhibited type A pH-activity profiles ( ...
biology - Kendriya Vidyalaya No.1 Kanchrapara
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Supplementary Table 1: WormBase IDs and given
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(Enzymes Lecture Notes).

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Sequence analysis of 16S rRNA, gyrB and catA genes and DNA

... approximately 1200 bp PCR product besides the approximately 1500 bp specific product, making direct sequencing impossible. Sequence analyses gave interesting results. The reported 0.2 % difference between 16S rRNA gene sequences of type strains of R. qingshengii and R. jialingiae was not found, beca ...
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Computer-Aided DNA Base Calling from Forward and Reverse

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Multiregional origin of B chromosomes in the grasshopper

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Non-random Allelic Variation

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An Efficient Oxidation of Benzoins to Benzils by Manganese (II
An Efficient Oxidation of Benzoins to Benzils by Manganese (II

... or complexity of workup. ere still appears a need either to improve the existing oxidation methods or to introduce novel reagents to permit better selectivity under milder conditions and with easy work-up procedures [12]. Transition metal catalysts supported by Schiff base ligands have assumed a pro ...
Geneticseasy
Geneticseasy

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Molecular Biology - Intro

... high degree of purity – characterized transforming factor using highly purified enzymes – found transforming factor to be DNA ...
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Chapt. 14 Eukaryotic mRNA processing I: splicing 14.1 Genes are in

... • U2 snRNA base-pairs with conserved sequence at splicing branchpoint • Essential for splicing • U2 also forms base pairs with U6 – Helps orient snRNPs for splicing • 5’-end of U2 interacts with 3’-end of U6 – important in splicing in mammalian cells, not ...
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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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