4.3.1.2	Cd2+	activates	6050	
4.3.1.2	Co2+	-	6049, 6051	
4.3.1.2	Co2+	activates	6050, 6059	
4.3.1.2	Co2+	approx. 5% of Mg2+ activation	653208	
4.3.1.2	Co2+	divalent cation requirement, cations in order of decreasing efficiency: Mg2+, Mn2+, Co2+	663816	
4.3.1.2	Cs+	-	6060	
4.3.1.2	Cs+	monovalent cation requirement, cations in decreasing order of efficiency: K+, Mn2+, Cs+	663816	
4.3.1.2	Cs+	required	6059	
4.3.1.2	Cu2+	approx. 10% of Mg2+ activation	653208	
4.3.1.2	Fe2+	activates	6050