2.7.7.53	Ca2+	2 mM, 38% of the activity with Mn2+	739577	
2.7.7.53	Ca2+	2 mM, 43% of the activity with Mn2+	739577	
2.7.7.53	Ca2+	activates	643515	
2.7.7.53	Ca2+	as good as Mn2+	209909, 643508	
2.7.7.53	Ca2+	less effective than Co2+	209909	
2.7.7.53	Ca2+	less effective than Mg2+	209909, 643507	
2.7.7.53	Ca2+	requirement, less effective than Mn2+	643507	
2.7.7.53	Ca2+	Rv2613c requires bivalent metal ions such as Ca2+ to exert its Ap4A phosphorylase activity (64% activity in the presence of 2 mM Ca2+)	713455	
2.7.7.53	Cd2+	slight activation	209909, 643507	
2.7.7.53	Co2+	2 mM, 60% of the activity with Mn2+	739577	
2.7.7.53	Co2+	2 mM, 89% of the activity with Mn2+	739577	
2.7.7.53	Co2+	activates	643515	
2.7.7.53	Co2+	activation, less effective than Mn2+ or Ca2+ or Mg2+	209909, 643507	
2.7.7.53	Co2+	Rv2613c requires bivalent metal ions such as Co2+ to exert its Ap4A phosphorylase activity (68% activity in the presence of 2 mM Co2+)	713455	
2.7.7.53	Co2+	slight activation of P1,P4-bis(5'-adenosyl) tetraphosphate-synthesis	643508	
2.7.7.53	divalent metal cations	requirement	209909, 643507, 643513	
2.7.7.53	Mg2+	-	209909	
2.7.7.53	Mg2+	2 mM, 97% of the activity with Mn2+	739577	
2.7.7.53	Mg2+	2 mM, 98% of the activity with Mn2+	739577	
2.7.7.53	Mg2+	activation, P1,P4-bis(5'-adenosyl) tetraphosphate-synthesis	643508	
2.7.7.53	Mg2+	inhibitory in presence of phosphate for ADP/phosphate exchange reaction	643514	
2.7.7.53	Mg2+	less effective than Mn2+ or Ca2+	643508	
2.7.7.53	Mg2+	required	643507, 760256	
2.7.7.53	Mg2+	required, most effective divalent cation	643515	
2.7.7.53	Mg2+	Rv2613c requires bivalent metal ions such as Mg2+ to exert its Ap4A phosphorylase activity (34% activity in the presence of 2 mM Mg2+)	713455	
2.7.7.53	Mn2+	10 mM	209909	
2.7.7.53	Mn2+	2 mM, best divalent activator	739577	
2.7.7.53	Mn2+	activates	643515	
2.7.7.53	Mn2+	less effective than Mg2+ or Co2+	209909	
2.7.7.53	Mn2+	not NDP-arsenolysis or NDP/phosphate-exchange reaction	643510	
2.7.7.53	Mn2+	required	643507	
2.7.7.53	Mn2+	requirement, Ap4A-synthesis	643508	
2.7.7.53	Mn2+	Rv2613c requires bivalent metal ions such as Mn2+ to exert its Ap4A phosphorylase activity (100% activity in the presence of 2 mM Mn2+)	713455	
2.7.7.53	additional information	Cu2+	643508	
2.7.7.53	additional information	no activation by Ni2+	643507, 643508	
2.7.7.53	additional information	no divalent metal cation requirement for NDP-arsenolysis or NDP/phosphate-exchange reaction	643510, 643513	
2.7.7.53	Zn2+	no effect	643507	
2.7.7.53	Zn2+	slight activation	209909, 643515	
2.7.7.53	Zn2+	slight activation of P1,P4-bis(5'-adenosyl) tetraphosphate-synthesis	643508