(R)-propane-1,2-diol + NAD(+) = (R)-lactaldehyde + NADH + H(+)
(r)-propane-1,2-diol + nad(+) = (r)-lactaldehyde + nadh + h(+)
(R)-propane-1,2-diol + NAD(+) = (R)-lactaldehyde + NADH + H(+)
(r)-propane-1,2-diol + nad(+) = (r)-lactaldehyde + nadh + h(+)