3.6.1.28	Ba2+	7.3% of the activation with Mg2+	210020	
3.6.1.28	Br-	stimulation by anions with the following order of effectiveness: SCN-, I-, NO3-, Br-, Cl-, membrane-associated enzyme	210006	
3.6.1.28	Ca2+	12.7% of the activation with Mg2+	210020	
3.6.1.28	Ca2+	activates membrane-associated enzyme	210016	
3.6.1.28	Ca2+	divalent cation requirement is fullfilled by Mg2+ or Ca2+ in microsomes and by Mg2+ but not Ca2+ in soluble fraction	210010	
3.6.1.28	Ca2+	divalent cation requirement is satisfied by Mg2+ or Ca2+	210015	
3.6.1.28	Ca2+	divalent cation requirement is satisfied by Mg2+, Mn2+ or Ca2+	210006, 210013, 210016	
3.6.1.28	Ca2+	maximal activation occurs at a cation to substrate ratio of 1:1	210006	
3.6.1.28	Ca2+	the addition of Ca2+ at 5 mM concentration enhances the rate of thiamine triphosphate hydrolysis by a factor of 17-20	758528	
3.6.1.28	Cl-	stimulation by anions with the following decreasing order of effectiveness: SCN-, I-, NO3-, Br-, Cl-, membrane-associated enzyme	210006