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stop codon

noun

, Genetics.
  1. a codon that stops the synthesis of a protein molecule.


stop codon

/ stŏp /

  1. Any of three codons in a molecule of messenger RNA that do not code for an amino acid and thereby signal the termination of the synthesis of a protein. The three stop codons are UAA, UAG, and UGA, where U is uracil, A is adenine, and G is guanine.
  2. Also called termination codon


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