3.6.1.41	Mn2+	900fold stimulation	246770	
3.6.1.41	Mn2+	best activator. In the presence of Mn2+, PrpA hydrolyzes P1,P5-bis(adenosyl)tetraphosphate mainly into AMP and ATP, whereas in the presence of Co2+ PrpA hydrolyzes P1,P5-bis(adenosyl)tetraphosphate into two molecules of ADP, reaction of EC 3.6.1.17	733872	
3.6.1.41	Ni2+	0.004-0.008 mM, 3.5fold stimulation	246765