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Stopped flow studies were undertaken to examine the kinetics of reduction of 5,6-benzoflavone-inducible P-450 LM4 by NADPH in the presence of NADPH-cytochrome P-450 reductase and phospholipid under anaerobic CO at 25 degrees C. The reaction exhibited biphasic kinetics irrespective of NADPH concentration or of the molar ratio of reductase to P-450 LM4 ...
K . P Vatsis, D . D Oprian, M. J Coon
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The cell-free extract of a cytochrome P-450-producing fungus, Fusarium oxysporum, was found to catalyze the hydroxylation of fatty acids. Three product isomers were formed from a single fatty acid. The products from lauric acid were identified by mass-spectrometry as 9-, 10-, and 11-hydroxydodecanoic acids, and those from palmitic acid as 13-, 14-, and
Hirofumi Shoun +2 more
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NADPH reduction of cytochrome P-450 at different integrational levels of the enzyme system
The complex monooxygenatic enzyme exhibits different functional behaviour at different integrational levels, thus indicating distinct organizational states. The aerobic NADPH reduction of microsomes, solubilized and reconstituted systems follows a biphasic kinetics, the two phases are attributed to associated state (cluster) and random cytochrome P-450
J Blanck +5 more
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The Cytochrome P-450 Drug Metabolizing Enzyme System
Bruno Wroblewski, Mel B. Glenn
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The biological oxidation of several tributyltin derivatives, by a cytochrome P-450 dependent monooxygenase enzyme system with reduced nicotinamideadeninedinucleotidephosphate as the essential cofactor, produced carbon-hydroxylated compounds identified as alpha-, beta-, gamma- and delta-hydroxybutyldibutyltin derivatives.
Fish Rh
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Biochemical and Biophysical Research Communications, 1981
Abstract Cytochrome P-450 from liver microsomes of phenobarbital-treated rabbits catalyzed anaerobic dehalogenation of halothane (2-bromo-2-chloro-1,1,1-trifluoroethane) when combined with NADPH and NADPH-cytochrome P-450 reductase. Cytochromes P-450B1 and P-448 from liver microsomes of untreated rabbits were less active. Triton X-100 accelerated the
K, Fujii +5 more
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Abstract Cytochrome P-450 from liver microsomes of phenobarbital-treated rabbits catalyzed anaerobic dehalogenation of halothane (2-bromo-2-chloro-1,1,1-trifluoroethane) when combined with NADPH and NADPH-cytochrome P-450 reductase. Cytochromes P-450B1 and P-448 from liver microsomes of untreated rabbits were less active. Triton X-100 accelerated the
K, Fujii +5 more
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SECRETION OF MEDULLIPIN I BY THE KIDNEY INVOLVES THE CYTOCHROME P-450 ENZYME SYSTEM
Journal of Hypertension, 1994To determine whether secretion of medullipin I by the kidney is dependent on the cytochrome P-450 enzyme system in Sprague-Dawley and spontaneously hypertensive rats (SHR).Isolated kidneys from Sprague-Dawley rats were perfused with 5% human albumin gassed with 95% O2 and 5% CO2 at 185 mmHg. The resultant renal venous effluent was tested in the SHR for
E E, Muirhead, B, Brooks, L W, Byers
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Chapter 9 The Molecular Basis of Electron Transfer in Cytochrome P-450 Enzyme Systems
Robert D. Gray
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