histamine + O2 + H2O <=> imidazole-4-acetaldehyde + H2O2 + NH4(+)
histamine + o2 + h2o <=> imidazole-4-acetaldehyde + h2o2 + nh4(+)
histamine + O2 + H2O <=> imidazole-4-acetaldehyde + H2O2 + NH4(+)
histamine + o2 + h2o <=> imidazole-4-acetaldehyde + h2o2 + nh4(+)