label: 1-hydroxy-3-methylbutan-2-one + NH4(+) + NADH + H(+) => (2S)-2-amino-3-methylbutan-1-ol + NAD(+) + H2O
label_lc: 1-hydroxy-3-methylbutan-2-one + nh4(+) + nadh + h(+) => (2s)-2-amino-3-methylbutan-1-ol + nad(+) + h2o