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- W2091660788 abstract "Highly purified liver microsomal cytochrome P-450 catalyzes the hydroperoxide-dependent hydroxylation of a variety of substrates in the absence of NADPH, NADPH-cytochrome P-450 reductase, and molecular oxygen. The addition of phosphatidylcholine is necessary for maximal activity. The absence of flavoproteins and cytochrome b5 from the cytochrome P-450 preparations rules out the involvement of other known microsomal electron carriers. The ferrous form of cytochrome P-450 is not involved in peroxide-dependent hydroxylation reactions, as indicated by the lack of inhibition by carbon monoxide. With cumene hydroperoxide present, a variety of substrates is attacked, including N-methylaniline, N,N-dimethylaniline, cyclohexane, benzphetamine, and aminopyrine. With benzphetamine as the substrate, cumene hydroperoxide may be replaced by other peroxides, including hydrogen peroxide, or by peracids or sodium chlorite. A study of the stoichiometry indicated that equimolar amounts of N-methylaniline, formaldehyde, and cumyl alcohol (α,α-dimethylbenzyl alcohol) are formed in the reaction of N,N-dimethylaniline with cumene hydroperoxide. Since H218O is incorporated only slightly into cyclohexanol in the reaction of cyclohexane with cumene hydroperoxide, it appears that the oxygen atom in cyclohexanol is derived primarily from the peroxide. The data obtained are in accord with a peroxidase-like mechanism for the action of cytochrome P-450." @default.
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- W2091660788 date "1976-08-01" @default.
- W2091660788 modified "2023-09-30" @default.
- W2091660788 title "Studies on hydroperoxide-dependent substrate hydroxylation by purified liver microsomal cytochrome P-450" @default.
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- W2091660788 doi "https://doi.org/10.1016/0003-9861(76)90541-5" @default.
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