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Biology LibreTexts

2.9: Polypeptides

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  • Figure 2.9.2: A longer peptide.

    The sequence of amino acids in a polypeptide is dictated by the codons in the messenger RNA (mRNA) molecules from which the polypeptide was translated. The sequence of codons in the mRNA was, in turn, dictated by the sequence of codons in the DNA from which the mRNA was transcribed. Proteins are made up of one or more polypeptide molecules.

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