Abstract
The presence of the components of polysubstrate monooxygenase (PSMO) activity, viz., cytochrome P-450 and NADPH cytochrome P-450 reductase has been established for the first time in the microsomes of Aspergillus parasiticus . The microsomes were able to metabolize benzphetamine. NADPH cytochrome P-450 reductase, benzphetamine metabolism and aflatoxin production was increased by the presence of phenobarbitone (PB, 2mg/ml) in the medium. These results demonstrate that induction of PSMO activity could be a prerequisite for increased production of aflatoxins, since hydroxylation of intermediates is an obligatory step in aflatoxin biosynthesis.
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