2-oxobutanoate + NADH + H(+) => (2S)-hydroxybutanoate + NAD(+)
2-oxobutanoate + nadh + h(+) => (2s)-hydroxybutanoate + nad(+)
2-oxobutanoate + NADH + H(+) => (2S)-hydroxybutanoate + NAD(+)
2-oxobutanoate + nadh + h(+) => (2s)-hydroxybutanoate + nad(+)