2.7.1.3	Cs+	absolute requirement for both monovalent and divalent cations, when Mg2+ fills the requirement for divalent cation, K+ and Rb+ are the most active monovalent cations, NH4+, Na+, Cs+ and Li+ are decreasingly active	641277	
2.7.1.3	Cs+	activates	641279	
2.7.1.3	CsCl	the enzyme is maximally active in the presence of 1.2 M KCl. Activity in the presence of RbCl and CsCl is similar to that observed in the presence of KCl	727726	
2.7.1.3	K+	absolute requirement for both monovalent and divalent cations, when Mg2+ fills the requirement for divalent cation, K+ and Rb+ are the most active monovalent cations	641277	
2.7.1.3	K+	KCl activates	641276	
2.7.1.3	K+	Km: 15 mM	641279	
2.7.1.3	K+	NH4+, Na+, Cs+ and Li+ are decreasingly active	641277	
2.7.1.3	K+	potassium acetate	641276	
2.7.1.3	KCl	the enzyme is maximally active in the presence of 1.2 M KCl. Activity in the presence of RbCl and CsCl is similar to that observed in the presence of KCl	727726	
2.7.1.3	Li+	absolute requirement for both monovalent and divalent cations, when Mg2+ fills the requirement for divalent cation, K+ and Rb+ are the most active monovalent cations, NH4+, Na+, Cs+ and Li+ are decreasingly active	641277	
2.7.1.3	Mg2+	-	641283, 641284, 641285	
2.7.1.3	Mg2+	absolute requirement for both monovalent and divalent cations, for optimal activity the concentration of Mg2+ must equal or exceed the concentration of ATP	641277	
2.7.1.3	Mg2+	inactive in absence of Mg2+ or Mn2+	641276	
2.7.1.3	Mg2+	most active at a Mg2+ concentration of 1 mM. Mg2+ can not be replaced by Mn2+. ATP/Mg2+ in the ratio of 1:2 forms the actual substrate for ketohexokinase activity	727726	
2.7.1.3	Mn2+	inactive in absence of Mg2+ or Mn2+	641276	
2.7.1.3	Na+	absolute requirement for both monovalent and divalent cations, when Mg2+ fills the requirement for divalent cation, K+ and Rb+ are the most active monovalent cations, NH4+, Na+, Cs+ and Li+ are decreasingly active	641277	
2.7.1.3	Na+	activates	641279	
2.7.1.3	NaCl	stimulates, yields 50% of the activity observed in equimolar KCl	727726	
2.7.1.3	NH4+	absolute requirement for both monovalent and divalent cations, when Mg2+ fills the requirement for divalent cation, K+ and Rb+ are the most active monovalent cations, NH4+, Na+, Cs+ and Li+ are decreasingly active	641277	
2.7.1.3	NH4+	activates	641279	
2.7.1.3	Rb+	absolute requirement for both monovalent and divalent cations, when Mg2+ fills the requirement for divalent cation, K+ and Rb+ are the most active monovalent cations, NH4+, Na+, Cs+ and Li+ are decreasingly active	641277	
2.7.1.3	Rb+	activates	641279	
2.7.1.3	RbCl	the enzyme is maximally active in the presence of 1.2 M KCl. Activity in the presence of RbCl and CsCl is similar to that observed in the presence of KCl	727726	
2.7.1.3	Tl+	activates	641279