Medical Dictionary

stop codon

noun \ ˈstäp- \

medical Definition of stop codon

:a genetic codon in messenger RNA that signals the termination of protein synthesis during translation
  • Each codon stands for one of the 20 amino acids that make up proteins or for one of three stop codons that signal the end of a protein chain.
  • —Tina HesmanScience News3 June 2000
called also termination codon; compare start codon

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