label: 4-methylsulfanyl-2-oxobutanoate + NADH + H(+) => (2R)-2-hydroxy-4-(methylsulfanyl)butanoate + NAD(+)
label_lc: 4-methylsulfanyl-2-oxobutanoate + nadh + h(+) => (2r)-2-hydroxy-4-(methylsulfanyl)butanoate + nad(+)