Figure 1
From: Molecular evolution of the polyamine oxidase gene family in Metazoa
Enzymatic reaction catalyzed by SMO and APAO proteins. SMO oxidises the carbon on the exo-side of the N5-nitrogen of Spm, producing Spd, 3-aminopropanal (3-AP) and hydrogen peroxide (H2O2). APAO oxidises the carbon on the exo-side of the N5-nitrogen of N1Ac-Spm and N1Ac-Spd producing Spd and Put respectively, in addition to 3-aceto-aminopropanal (3-aceto-AP) and H2O2.