4.1.1.33	Ba2+	4 mM, activates at 17% of the activity of Mg2+	4377	
4.1.1.33	Ca2+	4 mM, activates at 44% of the activity of Mg2+	4377	
4.1.1.33	Cd2+	MgCd2, activates at 37% of the activity of Mn2+	4378	
4.1.1.33	Co2+	4 mM, activates at 13% of the activity of Mg2+	4377	
4.1.1.33	Co2+	divalent metal ion required, Mg2+ can be substituted by Mn2+ or Co2+	650496	
4.1.1.33	Co2+	divalent metal ion required, Mg2+, Mn2+ or Co2+	4383	
4.1.1.33	Co2+	Mn2+ and Co2+ are the best activators for the 45000 MW enzyme form	4383	
4.1.1.33	Mg2+	20 mM, required for activity	690629	
4.1.1.33	Mg2+	4 mM, activates	4377	
4.1.1.33	Mg2+	divalent cation required, Mg2+ and Mn2+ being most effective	4374