. "Reviewed: D'Eustachio, P, 2007-04-30 14:43:26"^^ . "Authored: D'Eustachio, P, 2007-02-27 21:49:11"^^ . "Edited: D'Eustachio, P, 2007-02-27 21:49:11"^^ . "5Beta-cholesten-7alpha,27-diol-3-one and NADPH + H+ form 5beta-cholestan-3alpha,7alpha,27-triol and NAPDP+. The reaction is catalyzed by 3alpha-hydroxysteroid dehydrogenase (AKR1C4), a cytosolic enzyme belonging to the aldo-keto reductase family (Dufort et al. 2001). Biochemical studies with rat proteins raise the possibility that other related enzymes may also carry out this reaction in vivo (Russell 2003)."^^ . . . . . . . "5beta-cholestan-7alpha,27-diol-3-one is reduced to 5beta-cholestan-3alpha,7alpha,27-triol"^^ . "5beta-cholestan-7alpha,27-diol-3-one+ NADPH + H+ => 5beta-cholestan-3alpha,7alpha,27-triol + NADP+"^^ . . . . . .