5.3.1.15	Ca2+	metal ion required, Ca2+ activates slightly	2638, 2639	
5.3.1.15	Ca2+	the addition of Ca2+ ion to EDTA-treated enzyme enhances the activity of D-lyxose isomerization	716074	
5.3.1.15	Co2+	1 mM, 9.1fold activation	749201	
5.3.1.15	Co2+	about 40% activity in the presence of 1 mM Co2+ as compared to Mn2+	713845	
5.3.1.15	Co2+	activating at 1 mM, D-xylose as substrate	674319	
5.3.1.15	Co2+	maximum activity (6.6fold) in the presence of 0.5 mM Co2+	727225	
5.3.1.15	Co2+	metal ion required, Co2+ activates slightly	2638, 2639	
5.3.1.15	Fe2+	1 mM, 2.1fold activation	749201	
5.3.1.15	Fe2+	metal ion required, Fe2+ activates	2638, 2639	
5.3.1.15	Fe3+	metal ion required, Fe3+ activates	2638, 2639	
5.3.1.15	Mg2+	about 150% activity at 1 mM Mg2+	715675	
5.3.1.15	Mg2+	about 50% activity in the presence of 1 mM Mg2+ as compared to Mn2+	713845	
5.3.1.15	Mn2+	1 mM, 12.5fold activation	749201	
5.3.1.15	Mn2+	at 1 mM, D-xylose as substrate, requires divalent metal ions	674319	
5.3.1.15	Mn2+	highest activity (100%) in the presence of 1.0 mM Mn2+	713845	
5.3.1.15	Mn2+	maximal activity (about 250%) in the presence of 1 mM Mn2+	715675	
5.3.1.15	Mn2+	maximum activity (190%) in the presence of 1 mM Mn2+	716074	
5.3.1.15	Mn2+	metal ion required, Mn2+ activates most effectively. Km: 0.0004 mM	2638, 2639	
5.3.1.15	Mn2+	optimum activity in the presence of 1 mM Mn2+	714568	
5.3.1.15	Mn2+	stimulates activity but to a lesser extent than Co2+	727225	
5.3.1.15	additional information	not activated by Zn2+, Cu2+, and Ni2+	713845	
5.3.1.15	Ni2+	1 mM, 11.8fold activation	749201	
5.3.1.15	Ni2+	activating at 1 mM, D-xylose as substrate	674319