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NADPH-·fer·ri·he·mo·pro·tein re·duc·tase(fer'ī-hē-mō-prō'tēn, fer'ē-),
an enzyme catalyzing the reduction of 2 ferricytochrome by NADPH to 2 ferrocytochrome; the physiologic acceptor is probably cytochrome P-450; thus, it has a role in steroid hydroxylations.
Synonym(s): cytochrome reductase
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