title: Stereospecificity of hydrogen transfer from NADPH by steroid   4 -5 - and   4 -5 -reductase.
mesh_terms: D000731:Androstanes / Q000378:metabolism; D000818:Animals; D002247:Carbon Isotopes; D002855:Chromatography, Thin Layer; D006865:Hydrogenation; D007664:Ketosteroids; D008862:Microsomes, Liver / Q000201:enzymology; D009249:NADP / Q000378:metabolism*; D010088:Oxidoreductases / Q000378:metabolism*; D051381:Rats; D013237:Stereoisomerism; D013739:Testosterone / Q000378:metabolism; D014316:Tritium
chemical_list: D000731:Androstanes; D002247:Carbon Isotopes; D007664:Ketosteroids; D014316:Tritium; D013739:Testosterone; D009249:NADP; D010088:Oxidoreductases