In enzymology, a lactaldehydedehydrogenase (EC 1.2.1.22) is an enzyme that catalyzes the chemical reaction: (S)-lactaldehyde + NAD+ + H2O ↔ (S)-lactate + NADH + 2 H+. The 3 substrates of this enzyme are (S)-lactaldehyde, NAD+, and H2O, whereas its 3 products are (S)-lactate, NADH, and H+. This...