a 3-oxosteroid + NADH + H(+) => a 3alpha-hydroxysteroid + NAD(+)
a 3-oxosteroid + nadh + h(+) => a 3alpha-hydroxysteroid + nad(+)
a 3-oxosteroid + NADH + H(+) => a 3alpha-hydroxysteroid + NAD(+)
a 3-oxosteroid + nadh + h(+) => a 3alpha-hydroxysteroid + nad(+)