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dna TRANSCRIPTION AND tRANSLATION
dna TRANSCRIPTION AND tRANSLATION

... Pyrimidines: Thymine, Cytosine, and Uracil (note: in RNA, Uracil replaces Thymine) Nucleotide pairing – Also known as base pairing, is the joining of purine to a pyrimidine through a hydrogen bond link (A—T, C—G, or A—U in RNA) Ribonucleic acid (RNA) – Messenger to carry instructions from DNA for co ...
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palm-print on stickers as a replacement of blood
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... From time to time for unknown reasons, the DNA obtained by the above procedure was not clean enough to give reliable DNA profiles. We found that spin-column chromatography using Sephadex G-50 (Sigma) or comparable measures like Microcon (Amicon) ultrafiltration seemed to be helpful (Figure 5). The ...
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Minos, a new transposable element from Drosophila hydei, is a

... sequence (2) (Figure 1). Southern blots of restricted DNA from two D. hydei strains showed distinct banding patterns (Figure 1), suggesting that the element is, or has until recently been mobile. The element was named Minos, after the legendary king who inhabited the palace located near our laborato ...
Zinc finger nucleases
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... exogenously introduced homologous DNA fragment, also referred to as the "donor DNA".In the absenceofaDSBat the targetlocus, typically fewer than1in105 of targetedcellswillcontain the desired genetic modification, a frequency too low to be useful for gene therapy[14]. However, proof‐of‐principle expe ...
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... • A panel of 100-200 hybrids with 5-10 different fragments of human DNA in each gives about 1000 fragments in total, i.e. the human genome has been divided into 1000 bits. • The closer together 2 markers are in the genome, the more likely it is that they will be present in the same hybrids (since th ...
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... treated with cellulase than those treated without. This is due to the action of the enzyme cellulase in breaking down the cellulose of plant cell walls. The amount of DNA extracted from animal cells depends on the type of animal tissue being used. The shrimp sample probably resulted in less DNA than ...
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... Protein synthesis: Adding amino acids & forming peptide bonds Which level of protein structure is being assembled? A. primary B. secondary C. tertiary D. quaternary Microtubules and Microfilaments What do they have in common? A. components of the cytoskeleton B. made of tubulin C. only found in plan ...
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... General information in E. coli DNA Calculate the length of an E. coli DNA molecule. Compare the length of the DNA molecule with the cell dimensions. How does the DNA molecule fit into the cell? Assume that the average protein in E. coli consist of a chain of 400 amino acids. What is the maximum numb ...
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Calling names

... translated into amino acid sequences • The “words” of the DNA “language” are triplets of bases called codons – 3 bases or nucleotides make one codon – Each codon specifies an amino acid – The codons in a gene specify the amino acid sequence of a polypeptide ...
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C b

... Very often in biochemical experiments it is used complicate buffer systems consisting of some organical components (TRIS, EDTA), two carged metalloions, so on; At interaction of many biopolymers with some dyes, drugs, metal ions heving more than one ionic charge aggregation, sedimentation of biomacr ...
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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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