3.4.23.12	4-(2-aminoethyl)benzenesulfonyl fluoride	about 70% residual activity at 0.1 mM	4308	
3.4.23.12	CoSO4	-	3452	
3.4.23.12	CuCl2	-	347	
3.4.23.12	cupric ions	strong inhibition of nepenthesin I and II by diazoacetyl-DL-norleucine in presence of cupric ions, no inactivation in absence of cupric ions	118050	
3.4.23.12	diazoacetyl-DL-norleucine	strong inhibition of nepenthesin I and II in presence of cupric ions, no inactivation in absence of cupric ions	21129	
3.4.23.12	Diazoacetyl-DL-norleucine methyl ester	i.e. DAN	1233	
3.4.23.12	dithiothreitol	isoforms nethepsin I, IIa and IIb are completely inactivated in the presence of 40-70 mM dithiothreitol	45	
3.4.23.12	DL-Norleucine methyl ester	-	29970	
3.4.23.12	DMSO	about 65% residual activity at 0.1 mM	896	
3.4.23.12	E-64	about 97% residual activity at 0.02 mM	559