3.4.22.51	2-mercaptoethanol	activates	638884	
3.4.22.51	dithiothreitol	activates	638884	
3.4.22.51	guanidine hydrochloride	activates at low concentrations but inhibits above 2 M	638878	
3.4.22.51	heparan sulfate	6-fold increased catalytic efficiency	696523	
3.4.22.51	KSCN	activates at low concentrations but inhibits above 1 M	638878	
3.4.22.51	L-cysteine	activates	638884	
3.4.22.51	Urea	activation at 2 M	638879	
3.4.22.51	Urea	maximal at 2 M with natural substrates, no activation with synthetic substrates	638878