(R)-malate + NADPH + 2 H(+) => (3R)-3-hydroxy-4-oxobutanoate + NADP(+) + H2O
(r)-malate + nadph + 2 h(+) => (3r)-3-hydroxy-4-oxobutanoate + nadp(+) + h2o
(R)-malate + NADPH + 2 H(+) => (3R)-3-hydroxy-4-oxobutanoate + NADP(+) + H2O
(r)-malate + nadph + 2 h(+) => (3r)-3-hydroxy-4-oxobutanoate + nadp(+) + h2o