2.8.2.8	Ca2+	22% of the activity with Mn2+	645930	
2.8.2.8	Ca2+	41% of the activity with Mn2+	645926	
2.8.2.8	Ca2+	can partially replace Mn2+ in activation	645934	
2.8.2.8	Mg2+	52% of the activity with Mn2+	645926	
2.8.2.8	Mg2+	activates at 10 mM	645933	
2.8.2.8	Mg2+	little effect	645934	
2.8.2.8	Mg2+	metal ion required, maximal activity with 5 mM	645930	
2.8.2.8	Mn2+	10 mM, 4 to 5fold activation	645934	
2.8.2.8	Mn2+	62% of the activity with Mg2+	645930	
2.8.2.8	Mn2+	divalent cation required	645926, 645934