Abstract

The monooxygenase of Aspergillus ochraceus TS capable of 11α-hydroxylation of progesterone has been resolved into three components and characterized as (i) cytochrome P450, (ii) NADPH-cytochrome P450-reductase and (iii) phosphatidyl choline. The 11α-hydroxylase was observed to be NADPH dependent, and hydroxylation was enhanced by a NADPH regenerating system. This fungal monooxygenase has many features in common with that of mammalian liver microsomes. The role of mammalian cytochrome P450 inducers were tested for induction of 11α-hydroxylase in Aspergillus ochraceus TS. The reductase has been partially purified.

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