a primary alcohol + NAD(+) = an aldehyde + H(+) + NADH a secondary alcohol + NAD(+) = a ketone + H(+) + NADH Binds 2 Zn(2+) ions per subunit. Inhibited by ethanol. Alcohol metabolism; ethanol biosynthesis via fermentation pathway. Multimeric (with different ratios of monomers). In Z.mobilis there are two isozymes of alcohol dehydrogenase. Belongs to the zinc-containing alcohol dehydrogenase family.