ID 1.1.1.270 DE 3-keto-steroid reductase. AN 3-KSR. CA 4-alpha-methyl-5-alpha-cholest-7-en-3-beta-ol + NADP(+) = 4-alpha-methyl- CA 5-alpha-cholest-7-en-3-one + NADPH. CC -!- Also acts on 5-alpha-cholest-7-en-3-one. DR P56937, DHB7_HUMAN ; O88736, DHB7_MOUSE ; Q62904, DHB7_RAT ; DR Q74ZZ0, ERG27_ASHGO; Q874K0, ERG27_CANAX; Q6FIV3, ERG27_CANGA; DR Q6BNP0, ERG27_DEBHA; Q6CJC2, ERG27_KLULA; O74732, ERG27_SCHPO; DR Q6CE88, ERG27_YARLI; Q12452, ERG27_YEAST; //