Microsomal metabolism of pyrrolizidine alkaloids: N-oxidation of seneciphylline and senecionine.


In vivo pretreatment of rats with phenobarbital or beta-naphthoflavone reduced the specific activity of microsomal pyrrolizidine alkaloid N-oxide formation. Heat pretreatment of microsomes under conditions intended to selectively inactivate the flavin-containing monooxygenase did not lower the rate of N-oxidation. Incubation in the presence of cytochrome P… (More)


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