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. 1980 Jan 15;186(1):377-80.
doi: 10.1042/bj1860377.

Metabolism of hydrogen peroxide in Euglena gracilis Z by L-ascorbic acid peroxidase

S Shigeoka, Y Nakano, S Kitaoka

Metabolism of hydrogen peroxide in Euglena gracilis Z by L-ascorbic acid peroxidase

S Shigeoka et al. Biochem J. .

Abstract

Euglena gracilis was found to contain a peroxidase that specifically require L-ascorbic acid as the natural electron donor in the cytosol. The presence of an oxidation-reduction system metabolizing L-ascorbic acid was demonstrated in Euglena cells. Oxidation of L-ascorbic acid by the peroxidase, and the absence of ascorbic acid oxidase activity, suggests that the system functions to remove H2O2 in E. gracilis, which lacks catalase.

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