6.5.1.6	K+	the enzyme does not require monovalent cations to be active. 2 mM KCl or up to 5 mM of NaCl increase its activity up to 70%. Higher concentrations of these cations are inhibitory, but the enzyme still retains 50% activity with 100 mM NaCl or 100 mM KCl	661788	
6.5.1.6	Mg2+	1 mM, 2.5fold stimulation	672745	
6.5.1.6	Mg2+	strongly dependent on the MgCl2. While optimal activity is obtained with 2 mM, it is almost totally inhibited with 10 mM MgCl2	661788	
6.5.1.6	Na+	the enzyme does not require monovalent cations to be active. 2 mM KCl or up to 5 mM of NaCl increase its activity up to 70%. Higher concentrations of these cations are inhibitory, but the enzyme still retains 50% activity with 100 mM NaCl or 100 mM KCl	661788	
6.5.1.6	Zn2+	1 mM, 1.5 fold stimulation	672745