Add time:07/24/2019         Source:sciencedirect.com

Metabolism of resolved radioactive stereoisomer, [14C](+)-benzo-(a)pyrene-trans-7,8-dihydrodiol by highly purified soybean lipoxygenase plus linoleic acid was investigated. Trans-anti-7,8,9,10-tetrahydrotetrol, the product of hydrolytic breakdown of ultimate mutagenic benzo(a)pyrene-anti-7,8-dihydrodiol,9,10-epoxide, was detected as a major metabolite. The epoxidation, depended on the enzyme concentration and was inhibited by nor-dihydroguaiaretic acid. This study provides evidence on the ability of lipoxygenase to catalyze the epoxidation of benzo(a)pyrene-7,8-dihydrodiol.

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