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<a accesskey="3" href="page.php?w=protein_secondary_structure&amp;p=2">3.Next</a>
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<p><b>Protein secondary structure</b> is the local spatial conformation of the <a href="page.php?w=polypeptide">polypeptide</a> backbone excluding the side chains. The two most common <a href="page.php?w=Protein_structure">secondary structural elements</a> are <a href="page.php?w=alpha_helix">alpha helices</a> and <a href="page.php?w=beta_sheet">beta sheet</a>s, though <a href="page.php?w=beta_turn">beta turn</a>s and <a href="page.php?w=omega_loop">omega loop</a>s occur as well. Secondary structure elements typically spontaneously form as an intermediate</p><p>
<a accesskey="3" href="page.php?w=protein_secondary_structure&amp;p=2">3.Next</a>
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