4-methyl-3-oxopentanoate + NH4(+) + NADH + H(+) => (3R)-beta-leucine + NAD(+) + H2O
4-methyl-3-oxopentanoate + nh4(+) + nadh + h(+) => (3r)-beta-leucine + nad(+) + h2o
4-methyl-3-oxopentanoate + NH4(+) + NADH + H(+) => (3R)-beta-leucine + NAD(+) + H2O
4-methyl-3-oxopentanoate + nh4(+) + nadh + h(+) => (3r)-beta-leucine + nad(+) + h2o