a 3-oxo-Delta(4)-steroid + NADPH + H(+) => a 3-oxo-5alpha-steroid + NADP(+)
a 3-oxo-delta(4)-steroid + nadph + h(+) => a 3-oxo-5alpha-steroid + nadp(+)
a 3-oxo-Delta(4)-steroid + NADPH + H(+) => a 3-oxo-5alpha-steroid + NADP(+)
a 3-oxo-delta(4)-steroid + nadph + h(+) => a 3-oxo-5alpha-steroid + nadp(+)