codon


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Related to codon: anticodon, codon usage, Anti codon

codon:

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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Codon

 

a coding unit, a set of three nucleotides (triplet) that determines the position of a particular amino acid in a polypeptide chain synthesized under the control of a gene. A codon is a unit of the genetic code by means of which all the genetic information is “recorded” in DNA and RNA molecules. Many amino acids have more than one codon (so-called degeneracy of the code). There are three codons which do not code amino acids; rather, they determine the beginning or end of the synthesis of a polypeptide chain.

codon

[′kō‚dän]
(genetics)
The basic unit of the genetic code, comprising sequential, nonoverlapping three-nucleotide sequences in messenger ribonucleic acid, each of which is translated into one amino acid; 61 of the 64 codons code for a specific protein synthesis; the other 3 are stop codons that specify termination of the growing polypeptide or protein chain.
References in periodicals archive ?
Since the original description of those 11 cases, 19 additional cases have been reported, including some in patients of the PRNP codon 129MM and 129MV genotypes (5-7).
1] (%) [beta] Genotype [beta]Codon 37 [beta] Codon [beta] Codon (TGG/TGA) 37 (TGG/TGA) 37 (TGG/TGA) homozygous heterozygous heterozygous
Do not forget that translation will not stop coding until a STOP codon is read.
The 'wobble rules' assume that only 48 codons can be distinguished owing to the physiochemical limitations of the translational mechanism and the resulting codon graph converges to 20 amino acids.
All macaques are homozygous for methionine on PRNP codon 129; thus, prion-amyloid cardiomyopathy cannot be related to polymorphic codon 129 in our study (10).
When the large-scale codon re-encoding method was applied by Antoine Nougairede and his colleagues to poliovirus and Influenza A virus, it resulted in a live but attenuated virus that had significant reduction of viral fitness.
The team, which is led by Yi Liu, a researcher in the Department of Physiology at the University of Texas Southwestern Medical Center, was perplexed when it found a paradoxical result years ago: that optimizing the use of codons (a sequence of three nucleotides that form a unit of genetic code in a DNA or RNA molecule) specifying an essential biological clock component actually abolished the organism's circadian rhythms.
Promoters--Add additional noncoding letters before the start codon.
84] alternate codes that assign at least one codon to each of the 20 amino acids (and "stop").
1%) exhibited mutation at codon 43 Lys [right arrow] Arg and 2 (4%) isolates exhibited mutation at codon 88 Lys[right arrow] Arg whereas remaining 20 (40.
To analyze codons 12 and 13 of the K-ras gene, 5 [micro]L of the DNA extraction product (stool DNA dissolved in elution buffer), derived from ~5 mg of initially collected stool, was used for the analyses.
495] (threonine at codon 495) phosphorylation of eNOS, which would inhibit eNOS activity.