Involved in the production of beta-alanine, a precursor of pantothenic acid. Multicopy suppressor of fenpropimorph resistance. H2O + O2 + spermine = 3-aminopropanal + H2O2 + spermidine H2O + O2 + spermidine = 3-aminopropanal + H2O2 + putrescine H2O + N(1)-acetylspermine + O2 = 3-acetamidopropanal + H2O2 + spermidine H2O + N(1)-acetylspermidine + O2 = 3-acetamidopropanal + H2O2 + putrescine H2O + N(8)-acetylspermidine + O2 = 4-acetamidobutanal + H2O2 + propane-1,3-diamine Binds 1 FAD per subunit. Present with 6960 molecules/cell in log phase SD medium. Belongs to the flavin monoamine oxidase family.