Abstract
Incubation of dehydroepiandrosterone with liver slices from male rats results in the biosynthesis of a blue-tetrazolium-reducing metabolite which has been isolated and identified as 16[alpha]-hydroxy-dehydroepiandrosterone. Reduced nicotinamide-adenine dinucleotide phosphate has a stimulating effect on this reaction. Little, if any, activity was shown by liver slices from female rats. Castration appears to decrease 16[alpha]-hydroxylating ability without its reaching, however, the low levels of the female.