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<p>the ?-glycosidic bond in <small>D</small>-lactose. The chemical reaction it catalyzes is:</p>

<p>
: C<sub>12</sub>H<sub>22</sub>O<sub>11</sub> + H<sub>2</sub>O -> C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> + C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> + heat.<br/>
:lactose + H<sub>2</sub>O -> ?-<small>D</small>-galactose + <small>D</small>-glucose</p>

<p>The only human gene encoding a lactase is LCT or <b>lactase-phlorizin hydrolase</b> (alternative symbol LPH). LCT has a lactase <a href="page.php?w=protein_domain">domain</a> and a <a href="page.php?w=phlorizin_hydrolase">phlorizin hydrolase</a></p><p>
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