2-oxobutanoate + NADPH + H(+) => (2R)-hydroxybutanoate + NADP(+)
2-oxobutanoate + nadph + h(+) => (2r)-hydroxybutanoate + nadp(+)
2-oxobutanoate + NADPH + H(+) => (2R)-hydroxybutanoate + NADP(+)
2-oxobutanoate + nadph + h(+) => (2r)-hydroxybutanoate + nadp(+)