1.13.11.76	Ca2+	2 mM, 79% residual activity	15	
1.13.11.76	Cd2+	2 mM abolishes enzyme activity completely	52	
1.13.11.76	Co2+	2 mM abolishes enzyme activity completely	23	
1.13.11.76	Cu2+	2 mM, 2.9% residual activity	19	
1.13.11.76	EDTA	2 mM, 50% residual activity	21	
1.13.11.76	Fe2+	2 mM, 57% residual activity. Not inhibitory in presence of ascorbate	25	
1.13.11.76	H2O2	2 mM, complete loss of activity	22	
1.13.11.76	Mg2+	2 mM, 91% residual activity	6	
1.13.11.76	Mn2+	2 mM, 31% residual activity	11	
1.13.11.76	Ni2+	2 mM abolishes enzyme activity completely	38	
1.13.11.76	Zn2+	2 mM abolishes enzyme activity completely	14