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<p><a href="page.php?w=tripeptide">tripeptide</a>s, and <a href="page.php?w=tetrapeptide">tetrapeptide</a>s.</p>

<p>Amino acids comprise peptides as <a href="page.php?w=Residue_%28chemistry%29">residues</a>. Peptides are usually "linear" with an <a href="page.php?w=N-terminus">N-terminal</a> (amine group) and <a href="page.php?w=C-terminus">C-terminal</a> (carboxyl group) residue at the ends.  <a href="page.php?w=Cyclic_peptide">Cyclic peptide</a>s are a distinct class.</p>

<p><big> Classification </big></p>
<p>Peptides have been classified according to</p><p>
<a accesskey="1" href="page.php?w=peptide&amp;p=1">1.Previous</a><br />
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