6.3.3.1	K+	absolutely required	1308, 1309, 1316	
6.3.3.1	K+	Km: 96 mM	1308	
6.3.3.1	K+	optimal concentration: 150 mM	1309	
6.3.3.1	Mg2+	absolutely required	1308, 1309, 1316	
6.3.3.1	Mg2+	Km: 0.3 mM	1308	
6.3.3.1	Mg2+	optimal concentration: 20 mM	1309