(2R)-2-hydroxy-4-(methylsulfanyl)butanoate + NADP(+) => 4-methylsulfanyl-2-oxobutanoate + NADPH + H(+)
(2r)-2-hydroxy-4-(methylsulfanyl)butanoate + nadp(+) => 4-methylsulfanyl-2-oxobutanoate + nadph + h(+)
(2R)-2-hydroxy-4-(methylsulfanyl)butanoate + NADP(+) => 4-methylsulfanyl-2-oxobutanoate + NADPH + H(+)
(2r)-2-hydroxy-4-(methylsulfanyl)butanoate + nadp(+) => 4-methylsulfanyl-2-oxobutanoate + nadph + h(+)