a 3alpha-hydroxysteroid + NADP(+) <=> a 3-oxosteroid + NADPH + H(+)
a 3alpha-hydroxysteroid + nadp(+) <=> a 3-oxosteroid + nadph + h(+)
a 3alpha-hydroxysteroid + NADP(+) <=> a 3-oxosteroid + NADPH + H(+)
a 3alpha-hydroxysteroid + nadp(+) <=> a 3-oxosteroid + nadph + h(+)