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- W1991438316 abstract "16-Dehydroprogesterone reductase (16-DHPR) activity was present in cell extracts of Eubacterium sp. strain 144 only when the organism was grown in the presence of steroids containing a delta 16-17 double bond and C-20-ketone. Cells grown with 16-dehydropregnenolone contained 16-DHPR activity but lacked delta 4-5-3-keto steroid reductase activity. Pyruvate or sodium dithionite served as electron donors for 16-DHPR and both reactions required methyl viologen as an electron carrier. Neither NADH nor NADPH, with or without flavin nucleotides, were used by 16-DHPR. Enzyme activity was detected in the cytoplasmic fraction (40%) and membrane fraction (20%) of crude cell extracts, but 40% of the activity was unaccounted for following ultracentrifugation. 16-DHPR activity was unaffected by pH in potassium phosphate buffer over the range 5.0 to 8.5, but was inhibited by Tris-HCl above pH 7.0. 16-DHPR activity was inhibited by sulfhydryl reagents, but inhibitors of electron transport reactions or metal chelators did not affect the enzyme." @default.
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- W1991438316 date "1991-02-01" @default.
- W1991438316 modified "2023-09-24" @default.
- W1991438316 title "Characteristics of 16-dehydroprogesterone reductase in cell extracts of the intestinal anaerobe, Eubacterium sp. strain 144" @default.
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- W1991438316 doi "https://doi.org/10.1016/0960-0760(91)90134-q" @default.
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