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<p>it is the archetypal structure for its <a href="page.php?w=superfamily_%28molecular_biology%29">superfamily</a>, the <a href="page.php?w=PA_clan">PA clan</a> of proteases.</p>

<p><big> Activation </big></p>
<p>Chymotrypsin is <a href="page.php?w=protein_biosynthesis">synthesized</a> in the pancreas.  Its <a href="page.php?w=Precursor_%28chemistry%29">precursor</a> is <a href="page.php?w=chymotrypsinogen">chymotrypsinogen</a>. Trypsin activates chymotrypsinogen by cleaving peptidic bonds in positions Arg15 - Ile16 and produces ?-chymotrypsin. In turn,</p><p>
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