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Definition of Codon

Codon: A set of any three adjacent bases in DNA or RNA. There are 64 different codons, of which 61 specify the incorporation of an amino acid into a polypeptide chain; the remaining 3 are stop codons, which signal the ends of polypeptides.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=2771
Last Editorial Review: 3/19/2012

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