The interaction of NADH-cytochrome b5 reductase and cytochrome b5 bound to egg lecithin liposomes.

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The interaction of NADH-cytochrome b5 reductase and cytochrome b5 bound to egg lecithin liposomes.

Incubation of liposomes prepared by sonication of egg lecithin with the amphipathic form of cytochrome b5 results in the binding of a maximum of 244 molecules of cytochrome b5 per liposomal vesicle. Interactions of the phospholipid with the hydrophobic segment of cytochrome b5 are involved in this binding which does not disrupt the liposome. When a small amount of NADH-cytochrome b5 reductase i...

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Interaction of non-myristoylated NADH-cytochrome b5 reductase with cytochrome b5-dimyristoylphosphatidylcholine vesicles.

An expression vector for NADH-cytochrome b5 reductase containing a thrombin cleavage site directly before the N-terminal glycine residue of the flavoprotein was used to isolate the non-myristoylated enzyme by thrombin cleavage of the initial fusion protein of a short segment of the multiple cloning site of the plasmid vector and the reductase. This flavoprotein preparation, containing only the ...

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Unusual dehydroxylation of antimicrobial amidoxime prodrugs by cytochrome b5 and NADH cytochrome b5 reductase.

Furamidine is an effective antimicrobial agent; however, oral potency of furamidine is poor. A prodrug of furamidine, 2,5-bis(4-amidinophenyl)furan-bis-O-methylamidoxime (DB289), has greatly improved oral potency. DB289 is transformed to furamidine via O-demethylation, and N-dehydroxylation reactions with four intermediate metabolites formed. The O-demethylation reactions have been shown to be ...

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Erythrocyte NADH-cytochrome b(5) reductase reduces methaemoglobin to functional haemoglobin. In order to examine the function of the enzyme, the structure of NADH-cytochrome b(5) reductase from human erythrocytes has been determined and refined by X-ray crystallography. At 1.75 A resolution, the root-mean-square deviations (r.m.s.d.) from standard bond lengths and angles are 0.006 A and 1.03 de...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 1975

ISSN: 0021-9258

DOI: 10.1016/s0021-9258(19)41237-4