3-oxo-5-alpha-steroid 4-dehydrogenase activity enone reductase activity 3-oxo-5-alpha-steroid 4-dehydrogenase (NADP+) activity https://github.com/geneontology/go-ontology/issues/25314 https://github.com/geneontology/go-ontology/issues/28199 MetaCyc:RXN-711 3-oxosteroid 5alpha-reductase activity cholestenone 5-alpha-reductase activity steroid 5alpha-hydrogenase activity steroid 5alpha-reductase progesterone 5-alpha-reductase activity GO:0047751 KEGG_REACTION:R02610 MetaCyc:CHOLESTENONE-5-ALPHA-REDUCTASE-RXN RHEA:21952 testosterone delta4-hydrogenase activity MetaCyc:RXN-4229 RHEA:69987 RHEA:50816 Catalysis of the reaction: 3-oxo-5alpha-steroid + NADP+ = a 3-oxo-delta(4)-steroid + H+ + NADPH. sterol 5-alpha reductase activity MetaCyc:1.3.99.5-RXN RHEA:54416 RHEA:24552 EC:1.3.1.22 molecular_function cholestenone 5alpha-reductase activity RHEA:69991 RHEA:50820 3-oxosteroid delta4-dehydrogenase cholestenone 5a-reductase activity RHEA:54384 RHEA:84191 RHEA:84195 testosterone 5alpha-reductase