(S)-propane-1,2-diol + NAD(+) => (S)-lactaldehyde + NADH + H(+)
(s)-propane-1,2-diol + nad(+) => (s)-lactaldehyde + nadh + h(+)
(S)-propane-1,2-diol + NAD(+) => (S)-lactaldehyde + NADH + H(+)
(s)-propane-1,2-diol + nad(+) => (s)-lactaldehyde + nadh + h(+)