3.1.13.4	Ba2+	activates	134089	
3.1.13.4	Ba2+	less effective than Mg2+ or Mn2+	134089	
3.1.13.4	Ca2+	activates	134089	
3.1.13.4	Ca2+	less effective than Mg2+ or Mn2+	134089	
3.1.13.4	Cd2+	2 mM, activates reaction, can modulated the substrate length requirement	669291	
3.1.13.4	Co2+	2 mM, activates reaction, can modulated the substrate length requirement	669291	
3.1.13.4	Co2+	activates	134089	
3.1.13.4	Co2+	less effective than Mg2+ or Mn2+	134089	
3.1.13.4	Cu2+	activates	134089	
3.1.13.4	Cu2+	less effective than Mg2+ or Mn2+	134089