2.7.7.68	Co2+	1 mM, 16fold activation	
2.7.7.68	Fe2+	1 mM, 10fold activation	
2.7.7.68	Mg2+	1 mM, 23fold activation	
2.7.7.68	Mn2+	1 mM, 6fold activation	
2.7.7.68	Ni2+	1 mM, 8fold activation	
2.7.7.68	Zn2+	1 mM, 3fold activation