Wermuth B, Münch J D, von Wartburg J P
Experientia. 1979 Oct 15;35(10):1288-9. doi: 10.1007/BF01963961.
Aldehyde reductase from human liver catalyzes the hydrogen transfer from the pro-4R position on the dihydronicotinamide ring of the coenzyme to the re face of the carbonyl carbon atom of the substrate.