Chain-termination codon
A set of three adjacent bases in the DNA or their complementary bases in messenger RNA that specifies the end of a polypeptide chain. The three chain-termination codons (in messenger RNA) are UAA, UAG, and UGA. They are also called termination codons, stop codons, or nonsense codons. U = uracil; A = adenine; G = guanine.

Medical dictionary. 2011.

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  • Termination codon — A set of three adjacent bases in the DNA or their complementary bases in messenger RNA that specifies the end of a polypeptide chain. The three termination codons (in messenger RNA) are UAA, UAG, and UGA. They are also called chain termination… …   Medical dictionary

  • Termination — may refer to:In science: *Termination codon, in molecular biology *Termination factor, in genetics, part of the process of transcribing RNA *Termination type, in lithic reduction, a characteristic indicating the manner in which the distal end of… …   Wikipedia

  • Codon — A set of any three adjacent bases in the DNA or RNA. There are 64 different codons of which 61 specify the incorporation of an amino acid into a polypeptide chain while the remaining three are stop codons that signal the end of a polypeptide. For …   Medical dictionary

  • Codón de terminación — Esquema de un marco abierto de lectura, que incluye el codón de inicio (o start) y de parada (o stop). En genética se denomina codón de terminación , codón de parada, codón sin sentido o codón stop a aquel codón que no determina en el código… …   Wikipedia Español

  • Codon usage bias — refers to differences in the frequency of occurrence of synonymous codons in coding DNA. A codon is a series of three nucleotides (triplets) that encodes a specific amino acid residue in a polypeptide chain or for the termination of translation… …   Wikipedia

  • chaintermination codon — chain termination codon n. See stop codon. * * * …   Universalium

  • Stop codon — In the genetic code, a stop codon (or termination codon) is a nucleotide triplet within messenger RNA that signals a termination of translation.[1] Proteins are based on polypeptides, which are unique sequences of amino acids. Most codons in… …   Wikipedia

  • Stop codon — A set of three adjacent bases in the DNA or their complementary bases in messenger RNA that specifies the end of a polypeptide chain. The three stop codons (in messenger RNA) are UAA, UAG, and UGA. They are also called termination codons or… …   Medical dictionary

  • stop codon — A set of three nucleotides for which there is no corresponding tRNA molecule to insert an amino acid into the polypeptide chain. Protein synthesis is hence terminated and the completed polypeptide released from the ribosome. Three stop codons are …   Glossary of Biotechnology

  • Nonsense codon — A set of three adjacent bases in the DNA or their complementary bases in messenger RNA that specifies the premature end of a polypeptide chain. The three nonsense codons in messenger RNA are UAA, UAG, and UGA. When these codons are in their… …   Medical dictionary

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