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Biochem Biophys Res Commun. 1985 Nov 27;133(1):67-74.

Purification of N-hydroxy-2-acetylaminofluorene reductase from rabbit liver cytosol.


N-Hydroxy-2-acetylaminofluorene reductase was purified from rabbit liver cytosol by fractionation with ammonium sulfate, and chromatography with DEAE-cellulose, Sephadex G-200 and hydroxylapatite. The purified enzyme was homogeneous by the criterion of sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The molecular weight of the enzyme was estimated to be 34,000 by the electrophoresis and by gel filtration on Sephadex G-200. The enzyme required cysteine, glutathione, dithiothreitol, 2-mercaptoethanol, NADPH or NADH as an electron donor. The enzyme activity was inhibited by p-chloromercuribenzoic acid, N-ethylmaleimide, cupric sulfate or disulfiram, but little by oxygen.

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