3.5.3.11	dithiothreitol	the enzyme requires the presence of dithiothreitol for maximum activity	
3.5.3.11	L-arginine	but it inhibits at concentrations about 14 mM agmatine	
3.5.3.11	L-ornithine	but it inhibits at concentrations about 14 mM agmatine	
3.5.3.11	putrescine	but it inhibits at concentrations about 14 mM agmatine