Epimerization of an intermediary metabolite of norethynodrel by a 3 beta-hydroxy-delta 5(10)-steroid epimerase.
D000818:Animals; D001711:Biotransformation; D002250:Carbon Radioisotopes; D002855:Chromatography, Thin Layer; D004962:Estranes / Q000096:biosynthesis; D066298:In Vitro Techniques; D007535:Isomerases / Q000378:metabolism*; D007536:Isomerism; D008099:Liver / Q000201:enzymology*; D008297:Male; D009243:NAD / Q000378:metabolism; D009249:NADP / Q000378:metabolism; D009641:Norethynodrel / Q000378:metabolism*; D051381:Rats; D013256:Steroids / Q000032:analysis; D014316:Tritium
D002250:Carbon Radioisotopes; D004962:Estranes; D013256:Steroids; D009243:NAD; D014316:Tritium; D009249:NADP; D009641:Norethynodrel; D007535:Isomerases