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. 1976 Jul 1;157(1):283-5.
doi: 10.1042/bj1570283.

Turkey liver xanthine dehydrogenase. Relation between nicotinamide-adenine dinucleotide oxidoreductase activity and the content of functional enzyme

I N Fhaoláin, M P Coughlan

Turkey liver xanthine dehydrogenase. Relation between nicotinamide-adenine dinucleotide oxidoreductase activity and the content of functional enzyme

I N Fhaoláin et al. Biochem J. .

Abstract

The turkey liver xanthine dehydrogenase-catalysed oxidation of NADH by Methylene Blue, by ferricyanide or by O2 is not dependent on the integrity of the active-centre persulphide groups. By contrast, the NADH-dichlorophenol-indophenol oxidoreductase and NADH-trinitrobenzenesulphonate oxidoreductase activities are directly proportional to the content of functional enzyme. These findings help to identify the sites of egress of electrons to oxidizing substrates.

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