1.1.1.93	Co2+	1 mM, 30% of the activation with 0.4 mM MnCl2	389609	
1.1.1.93	K+	50 mM K2SO4, 56% of the activation with 50 mM KCl	389609	
1.1.1.93	K+	50 mM KCl, 63% of the activation with 50 mM NH4Cl	389609	
1.1.1.93	K+	monovalent cation required, maximal activity with K+ and Rb+	389612	
1.1.1.93	K+	required for binding of meso-tartrate	667741	
1.1.1.93	Mg2+	5 mM, 59% of the activation with 0.4 mM MnCl2	389609	
1.1.1.93	Mg2+	activates	389618	
1.1.1.93	Mg2+	optimal concentration: 50 mM	389619	
1.1.1.93	Mg2+	required	389619	
1.1.1.93	Mg2+	supports catalytic activity	389612	
1.1.1.93	Mn2+	activates	389618	
1.1.1.93	Mn2+	Km: 0.016 mM, reaction with L-malate or D-malate	389609	
1.1.1.93	Mn2+	monovalent and divalent cations are essential for optimal activity. At saturating concentrations of 0.4 mM MnCl2 ammonium sulfate stimulates optimally over a broad concentration range, from 40 mM to 100 mM	389609	
1.1.1.93	Mn2+	required	389610, 389612	
1.1.1.93	Mn2+	required for binding of meso-tartrate	667741	
1.1.1.93	Mn2+	supports catalytic activity	389612	
1.1.1.93	additional information	the reaction requires a divalent metal ion for activity	654622	
1.1.1.93	NaCl	50 mM KCl, 19% of the activation with 50 mM NH4Cl	389609	
1.1.1.93	Rb+	monovalent cation required, maximal activity with K+ and Rb+	389612	
1.1.1.93	Zn2+	0.1 mM, 14% of the activation with 0.4 mM MnCl2	389609