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Cytochrome P450 monooxygenases (P450; CYP) are a superfamily of hemecontaining enzymes which catalyze the molecular scission of the O--O bond of
atmospheric dioxygen using reducing equivalents supplied by NADPH/NADH
and channeled to the P450 heme Fe center almost always through ancillary redox
partner proteins [1,2]. Generally, one atom is incorporated into the substrate molecule
and the other oxygen atom is reduced to a water molecule (Scheme I). The array
of oxidation reactions catalyzed by the P450 enzyme superfamily is unprecedented
in biological chemistry.

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