stop-codon

stop codon

noun Genetics.
a codon that stops the synthesis of a protein molecule.
Also called chain termination codon.
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Science Dictionary
stop codon   (stŏp)  Pronunciation Key 
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. Also called termination codon.
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