Spermine oxidase
Spermine oxidase (EC1.5.3.16, PAOh1/SMO, AtPAO1, AtPAO4, SMO) is an enzyme with systematic name spermidine:oxygen oxidoreductase (spermidine-forming). This enzyme catalyses the following chemical reaction
The enzyme from Arabidopsis thaliana oxidizes norspermine to norspermidine.