4.2.1.39	Cd2+	the enzyme is activated by the presence of Co2+, Mg2+, Ni2+, Cd2+	728022	
4.2.1.39	Co2+	1 mM, activates. Presence of one Co2+ per enzyme monomer	663955	
4.2.1.39	Co2+	200% activation at 30 mM	5696	
4.2.1.39	Co2+	Fe2+ best activator, Mn2+, Co2+, Mg2+ can partially replace	5684, 5686, 5688	
4.2.1.39	Co2+	the enzyme is activated by the presence of Co2+, Mg2+, Ni2+, Cd2+	728022	
4.2.1.39	Fe2+	-	5684, 5690	
4.2.1.39	Fe2+	at 2 mM most effective, activates and reactivates after O2 inactivation, probably two distinct sites for activation and reactivation, Mn2+, Co2+, Mg2+ can partially replace	5686	
4.2.1.39	Fe2+	Fe2+ and sulfhydryl compound required	5688	
4.2.1.39	Mg2+	1 mM, activates	663955	
4.2.1.39	Mg2+	100% activation at 1 mM	5685	
4.2.1.39	Mg2+	Fe2+ best activator, Mn2+, Co2+, Mg2+ can partially replace	5684, 5685, 5686, 5688	
4.2.1.39	Mg2+	is required	704334	
4.2.1.39	Mg2+	not	5696	
4.2.1.39	Mg2+	required	5690	
4.2.1.39	Mg2+	the enzyme is activated by the presence of Co2+, Mg2+, Ni2+, Cd2+	728022	
4.2.1.39	Mn2+	1 mM, activates	663955	
4.2.1.39	Mn2+	40% activation at 30 mM	5696	
4.2.1.39	Mn2+	50% activation at 0.1 mM, 30% activation at 1 mM	5685	
4.2.1.39	Mn2+	Fe2+ most effective, Mn2+, Co2+, Mg2+ can partially replace	5684, 5685, 5686, 5688	
4.2.1.39	Ni2+	1 mM, activates	663955	
4.2.1.39	Ni2+	the enzyme is activated by the presence of Co2+, Mg2+, Ni2+, Cd2+	728022