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<a accesskey="3" href="page.php?w=ligand_%28biochemistry%29&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=biochemistry">biochemistry</a> and <a href="page.php?w=pharmacology">pharmacology</a>, a <b>ligand</b> is a <a href="page.php?w=Chemical_substance">substance</a> that forms a <a href="page.php?w=Complex_%28chemistry%29">complex</a> with a <a href="page.php?w=biomolecule">biomolecule</a> to serve a biological purpose. The etymology stems from Latin ligare, which means 'to bind'. In protein-ligand binding, the ligand is usually a <a href="page.php?w=molecule">molecule</a> which produces a <a href="page.php?w=Cell_signaling">signal</a></p><p>
<a accesskey="3" href="page.php?w=ligand_%28biochemistry%29&amp;p=2">3.Next</a>
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