putrescine + O2 + H2O => 4-aminobutanal + H2O2 + NH4(+)
putrescine + o2 + h2o => 4-aminobutanal + h2o2 + nh4(+)
putrescine + O2 + H2O => 4-aminobutanal + H2O2 + NH4(+)
putrescine + o2 + h2o => 4-aminobutanal + h2o2 + nh4(+)