ID 1.3.99.5 DE 3-oxo-5-alpha-steroid 4-dehydrogenase (acceptor). AN Steroid 5-alpha-reductase. CA A 3-oxo-5-alpha-steroid + acceptor = a 3-oxo-Delta(4)-steroid + reduced CA acceptor. CF Flavoprotein. CC -!- This bacterial enzyme, characterized from Comamonas testosteroni, CC is involved in androsterone degradation. CC -!- Cf. EC 1.3.1.22. DR Q59327, OASD_COMTE ; //