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Stop Codon

A stop codon is a trinucleotide sequence within a messenger RNA (mRNA) molecule that signals a halt to protein synthesis. The genetic code describes the relationship between the sequence of DNA bases (A, C, G, and T) in a gene and the corresponding protein sequence that it encodes. The cell reads the sequence of the gene in groups of three bases. Of the 64 possible combinations of three bases, 61 specify an amino acid, while the remaining three combinations are stop codons.

Date:June 12, 2010
Credit:Darryl Leja, NHGRI
Dimensions:1680 x 1121
File Size:383 Kb
Rights:PublicExcept where otherwise noted, this image is in the public domain and may be used, linked or reproduced without permission. If you use an image, please credit the source listed above with a link back to www.genome.gov where possible. Thank you!



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