label: cytochrome-b5 reductase activity, acting on NAD(P)H
label_lc: cytochrome-b5 reductase activity, acting on nad(p)h
description: "Catalysis of the reaction: NAD(P)H + H+ + 2 ferricytochrome b(5) = NAD(P)+ + 2 ferrocytochrome b(5)."