Source:http://linkedlifedata.com/resource/umls/id/C1324460
GO: Catalysis of the reaction: H2O + NAD+ + 3-alpha,7-alpha,12-alpha-trihydroxy-5-beta-cholestan-26-al = NADH + 3-alpha,7-alpha,12-alpha-trihydroxy-5-beta-cholestanate. [EC:1.2.1.40, MetaCyc:1.2.1.40-RXN]