An enzyme catalyzing an oxidation-reduction reaction. Trivial names for oxidoreductases include dehydrogenase, reductase, oxidase (where O2 is the H acceptor), oxygenase (where O2 is incorporated into the substrate), peroxidase (H2O2 is the acceptor; catalase is an exception), and hydroxylase (coupled oxidation of two donors).
See Also: oxidase
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Examples: glitazone, GI cocktail, etc.