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stop codon

noun, Genetics.
a codon that stops the synthesis of a protein molecule.
Also called chain termination codon. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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stop-codon in Science
stop codon
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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