5.3.1.15	Ba2+	about 80% residual activity at 1 mM	111	
5.3.1.15	Ba2+	-	111	
5.3.1.15	Ba2+	1 mM, 64% residual activity	111	
5.3.1.15	Co2+	about 15% residual activity at 1 mM	23	
5.3.1.15	Cu2+	about 55% residual activity at 1 mM	19	
5.3.1.15	Cu2+	-	19	
5.3.1.15	Cu2+	1 mM, 16% residual activity	19	
5.3.1.15	EDTA	-	21	
5.3.1.15	EDTA	12% residual activity at 1 mM	21	
5.3.1.15	Fe2+	about 60% residual activity at 1 mM	25