6.2.1.25	Co2+	restores activity partially after treatment with EDTA	649526	
6.2.1.25	Mg2+	optimal concentration: 5 mM MgCl2	711	
6.2.1.25	Mg2+	required	707, 708, 710, 711, 713, 744341, 744372, 744980	
6.2.1.25	Mg2+	restores activity after treatment with EDTA	649526	
6.2.1.25	Mn2+	can replace Mg2+	707, 710, 711, 713	
6.2.1.25	Mn2+	optimal concentration: 5 mM MnCl2, 85% of the efficiency compared to MgCl2	711	
6.2.1.25	Mn2+	restores activity after treatment with EDTA	649526