Alcohol dehydrogenase active against primary long-chain alcohols. Pentan-1-ol is the optimum substrate in vitro, but also shows efficient dehydrogenase activity on propanol, hexanol, and ethanol. a primary alcohol + NADP(+) = an aldehyde + H(+) + NADPH Thermostable. Heating at 70 degrees Celsius for 180 minutes gives no observable loss of enzymatic activity. Homotetramer. Seems to be constitutively expressed. Belongs to the iron-containing alcohol dehydrogenase family.