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Biochem Int. 1989 Nov;19(5):1117-24.

Superoxide--driven oxidation of quercetin and a simple sensitive assay for determination of superoxide dismutase.

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Department of Biology, V. I. Lenin Byelorussion State University, Minsk, BSSR, USSR.


Oxidation of quercetin at pH 10 was shown to be a free radical chain reaction involving superoxide and hence inhibitable by superoxide dismutase (SOD) (EC The degree of inhibition of quercetin oxidation was a function of SOD concentration, and fifty percent inhibition was produced by approximately 1.5 ng/ml of pure enzyme. This reaction proved to be a very useful tool for a rapid and highly sensitive measurement of SOD in crude tissue extracts and other biological samples.

[Indexed for MEDLINE]

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