An enzyme that catalyzes the conversion of one epimer into another, particularly important in carbohydrate metabolism.
From 'epimer' + '-ase' (enzyme suffix), literally 'an enzyme that transforms epimers.'
Your body uses epimerase enzymes constantly to shuffle atoms around in sugars—without them, you couldn't convert galactose from milk into glucose your cells can use, which is why people with certain enzyme deficiencies can't drink milk.
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