a 16-oxosteroid + NADH + H(+) => a 16alpha-hydroxysteroid + NAD(+)
a 16-oxosteroid + nadh + h(+) => a 16alpha-hydroxysteroid + nad(+)
a 16-oxosteroid + NADH + H(+) => a 16alpha-hydroxysteroid + NAD(+)
a 16-oxosteroid + nadh + h(+) => a 16alpha-hydroxysteroid + nad(+)