3.4.23.23	Al3+	5 mM, 16% residual activity	
3.4.23.23	Ca2+	5 mM, 44% residual activity	
3.4.23.23	Ca2+	119.09% activity at 2.5 mM	
3.4.23.23	Ca2+	218.8% activity at 5 mM	
3.4.23.23	Co2+	5 mM, 36% residual activity	
3.4.23.23	Cu2+	5 mM, 0.3% residual activity	
3.4.23.23	K+	117.3% activity at 5 mM	
3.4.23.23	Mg2+	106.8% activity at 5 mM	
3.4.23.23	Mg2+	110.91% activity at 10 mM	
3.4.23.23	Mn2+	5 mM, 36% residual activity	
3.4.23.23	Mn2+	109.31% activity at 2.5 mM	
3.4.23.23	Mn2+	120.7% activity at 5 mM	
3.4.23.23	additional information	not influenced by K+