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Interactions of some acceptors with superoxide anion radicals formed by the NADPH-specific flavoprotein in rat liver microsomal fractions.


ABSTRACT: In rat liver microsomal fractions oxidation of adrenaline was effected by superoxide anion radicals (O2-), whereas cytochrome c, 2,6-dichlorophenol-indophenol and ferricyanide accepted electrons from NADPH-specific flavoprotein only directly. Nitro Blue Tetrazolium was reduced both by O2- and by the direct acceptance of electrons. Elevation of pH and addition of menadione shift the Nitro Blue Tetrazolium reduction towards the O2--dependent pathway. From the values of the kinetic constants for interaction of adrenaline and Nitro Blue Tetrazolium with NADPH-specific flavoprotein, the rates of generation of O2- in rat liver microsomal fraction were determined.

SUBMITTER: Mishin V 

PROVIDER: S-EPMC1172711 | biostudies-other | 1976 Feb

REPOSITORIES: biostudies-other

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