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<p>family of enzymes (abbreviated GSH-Px) catalyze reduction of <a href="page.php?w=hydrogen_peroxide">hydrogen peroxide</a> and organic <a href="page.php?w=hydroperoxide">hydroperoxide</a>s:</p>

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:2GSH + H<sub>2</sub>O<sub>2</sub>   ->   GSSG  +  2 H<sub>2</sub>OThe two H atoms are donated by thiols in a process that begins with oxidation of a <a href="page.php?w=selenol">selenol</a> side chain in GSH-Px.  The <a href="page.php?w=organoselenium_compound">organoselenium compound</a> <a href="page.php?w=ebselen">ebselen</a> is a drug used to</p><p>
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