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see nucleic acidnucleic acid,
any of a group of organic substances found in the chromosomes of living cells and viruses that play a central role in the storage and replication of hereditary information and in the expression of this information through protein synthesis.
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DNA (deoxyribonucleic acid)

Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000


McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


deoxyribonucleic acid; a nucleic acid that is the main constituent of the chromosomes of all organisms (except some viruses). The DNA molecule consists of two polynucleotide chains in the form of a double helix, containing phosphate and the sugar deoxyribose and linked by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine. DNA is self-replicating, plays a central role in protein synthesis, and is responsible for the transmission of hereditary characteristics from parents to offspring
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


(1) See Windows DNA and DNA storage.

(2) (Digital Network Architecture) Introduced in 1978, the DNA was Digital's umbrella term for its enterprise network architecture based on DECnet. See Digital Equipment.
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References in periodicals archive ?
Furthermore, clone Aesp34 could be evidence for the existence of other evolutionarily conserved complex sequences in the genome and reflect species- and chromosome-specific repetitive DNA patterning/organization.
According to their annotation systems, the contents of molecular parameters of coding sequences (genes, exons and introns), noncoding sequences (repetitive DNA, Alu, LINES, MIR, MER, LTR, promoters, etc.) and coding/ non-coding DNA (TTAGGC, AAAAT, AAATT, TTTTC, TTTTT, CpG islands, etc.) are counted for each sequence.
The resulting defect in DNA repair causes substantial variability in the length of known segments of repetitive DNA, a phenomenon called microsatellite instability.
Telomeres are a region of repetitive DNA at the end of chromosomes, which protects the end of the chromosome from degradation and fusion.
RAPD bands often originate from repetitive DNA sequences (Williams et al.
To assess the presence or absence of a B2 integration in orthologous loci, primer sets were designed that flank the B2 element insertions (Figure la) utilizing PrimerSelect from the Lasergene suite of software tools (DNASTAR, Inc), and BLAST searches were performed to verify lack of homology of the primers to repetitive DNA. PCR amplifications were performed in 25-[mu]l volumes containing IX Go Taq buffer (Promega), 3.0 mM of MgCl2, 0.20 mM of dNTPs, 0.25 mM of each primer (Table 1), 1 U GoTaq DNA polymerase (Promega), and 50 ng of template DNA.
Repetitive DNA Sequences as probes for Mycobacterium tuberculosis.
The variability in DNA amount has often been attributed to loss or addition of highly repetitive DNA sequences rather than to the AT- or GC-rich sequences in the genome (Martel et al.
Comparison of various repetitive DNA elements as genetic markers for strain differentiation and epidemiology of Mycobacterium tuberculosis.
In addition, the region is rich in repetitive DNA with several Alu repeats which could facilitate homologous recombination with loci throughout the genome.
Physical localisation of repetitive DNA sequences in Alstroemeria: karyotyping of two species with species-specific and ribosomal DNA.
Analysis of a repetitive DNA sequence from Bordetella pertussis and its application to the diagnosis of pertussis using the polymerase chain reaction.

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