1.13.12.19	ascorbate	required	741936	
1.13.12.19	ascorbate	stimulates	743692	
1.13.12.19	D-arginine	3% of the activity with L-arginine	715784	
1.13.12.19	DTT	stimulates	743692	
1.13.12.19	L-arginine	highly specific for cofactor L-arginine, KM value 0.018 mM	715784	
1.13.12.19	L-canavanine sulfate	7% of the activity with L-arginine	715784