label: androsterone dehydrogenase (B-specific) activity
label_lc: androsterone dehydrogenase (b-specific) activity
description: "Catalysis of the reaction: NAD(P)+ + androsterone = NAD(P)H + H+ + 5-alpha-androstane-3,17-dione. The reaction is B-specific (i.e. the pro-S hydrogen is transferred from the 4-position of reduced nicotinamide cofactor) with respect to NAD(P)+."