2.09:_Polypeptides

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<figure><img style="width: 302px; height: 305px;" class="internal" alt="Diagram showing peptide bond formation between glycine, alanine, and cysteine. Water molecules are removed to form bonds, highlighted by red lines between amino acids." loading="lazy" width="302px" height="305px" src="https://bio.libretexts.org/@api/deki/files/5148/tripeptide.png?revision=1&amp;size=bestfit&amp;width=302&amp;height=305" /><figcaption>Figure 2.9.2: A longer peptide.</figcaption></figure> <p class="lt-bio-3787" style="background-color: unset;">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.</p>

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<hr class="autoattribution-divider" /><div class="autoattribution"><p>This page titled <a target="_blank" class="internal mt-self-link" href="/Sandboxes/johnnyphung/biology/02:_The_Molecules_of_Life/2.09:_Polypeptides">2.9: Polypeptides</a> is shared under a <a rel="nofollow" href="https://creativecommons.org/licenses/by/3.0" target="_blank">CC BY  3.0</a>  license and was authored, remixed, and/or curated by <a rel="nofollow" target="_blank" href="http://www.biology-pages.info/">John W. Kimball</a> via <a rel="nofollow" href="https://www.biology-pages.info/" target="_blank">source content</a> that was edited to the style and standards of the LibreTexts platform.</p></div>

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