Start and Stop Codons

Oct 07, 2014

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Start and Stop Codons. How to recognize and use them. Start Codon. Signals when to begin decoding a segment of DNA or RNA. Codes for the amino acid Methionine. Is the sequence ATG (in DNA) or AUG (in RNA). Stop Codons. Signal for the end of a DNA or RNA sequence.

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Start and Stop Codons

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Start and Stop Codons How to recognize and use them.
Start Codon • Signals when to begin decoding a segment of DNA or RNA. • Codes for the amino acid Methionine. • Is the sequence ATG (in DNA) or AUG (in RNA).
Stop Codons • Signal for the end of a DNA or RNA sequence. • Does not code for any amino acid. • There are three possibilities: TAG, TAA, TGA (in DNA) or UAG, UAA, UGA (in RNA).