4.2.3.16	K+	required, optimum concentration of 0.5 M	210753	
4.2.3.16	Mg2+	can substitute for Mn2+	210772	
4.2.3.16	Mg2+	cofactor	210765	
4.2.3.16	Mg2+	ineffective	210753	
4.2.3.16	Mg2+	Mn2+ preferred	210768	
4.2.3.16	Mn2+	required	210753, 210772, 586994	
4.2.3.16	Mn2+	required, optimum activity with 2 mM, inhibitory at higher concentrations	210768	
4.2.3.16	additional information	Ca2+, Cd2+, Co2+, Cu2+, Fe2+, Ni2+, Zn2+ activated less than 5%	210768