nonsense codons

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• nonsense codons — terminavimo kodonai statusas T sritis chemija apibrėžtis mRNR nukleutidų sekos UAG, UGA, UAA, nekoduojančios aminorūgšties. atitikmenys: angl. nonsense codons; stop codons; termination codons rus. нонсенс кодоны; стоп кодоны; терминирующие кодоны …   Chemijos terminų aiškinamasis žodynas

• Nonsense mutation — A mutation (a change) in a base in the DNA that prematurely stops the translation (reading) of messenger RNA (mRNA) resulting in a polypeptide chain that ends prematurely and a protein product that is truncated (abbreviated) and incomplete and… …   Medical dictionary

• 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

• Nonsense mediated decay — (NMD) is a cellular mechanism of mRNA surveillance to detect nonsense mutations and prevent the expression of truncated or erroneous proteins. In mammals, NMD is triggered by exon junction complexes (EJC), which are initially deposited during pre …   Wikipedia

• nonsense codon — (= nonsense triplet) The three codons, UAA (known as ochre), UAG (amber) and UGA (opal), that do not code for an amino acid but act as signals for the termination of protein synthesis. Any mutation that causes a base change which produces a… …   Dictionary of molecular biology

• Nonsense mutation — In genetics, a nonsense mutation is a point mutation in a sequence of DNA that results in a premature stop codon, or a nonsense codon in the transcribed mRNA, and in a truncated, incomplete, and usually nonfunctional protein product. It differs… …   Wikipedia

• nonsense — I. noun Date: 1614 1. a. words or language having no meaning or conveying no intelligible ideas b. (1) language, conduct, or an idea that is absurd or contrary to good sense (2) an instance of absurd action 2. a. things of no importance or value… …   New Collegiate Dictionary

• nonsense — As used in genetics, relating to a mutation that causes a sequence such that the growing peptide chain terminates, often after several incorrect amino acid residues are incorporated. n. suppression mutant tRNAs that read a chain termination cod …   Medical dictionary

• Nonsense-Codon — Als Stopcodon, auch Nonsense Codon wird in der Genetik ein Basentriplett (Codon) der Desoxyribonukleinsäure (DNA) beziehungsweise der Ribonukleinsäure (RNA) bezeichnet, für das keine zugehörige tRNA (Transfer RNA) vorliegt und somit den Abbruch… …   Deutsch Wikipedia

• stop codons — terminavimo kodonai statusas T sritis chemija apibrėžtis mRNR nukleutidų sekos UAG, UGA, UAA, nekoduojančios aminorūgšties. atitikmenys: angl. nonsense codons; stop codons; termination codons rus. нонсенс кодоны; стоп кодоны; терминирующие кодоны …   Chemijos terminų aiškinamasis žodynas

• termination codons — terminavimo kodonai statusas T sritis chemija apibrėžtis mRNR nukleutidų sekos UAG, UGA, UAA, nekoduojančios aminorūgšties. atitikmenys: angl. nonsense codons; stop codons; termination codons rus. нонсенс кодоны; стоп кодоны; терминирующие кодоны …   Chemijos terminų aiškinamasis žodynas