2.4.1.101	Ba2+	no activation	488360	
2.4.1.101	Ba2+	slight activation	488368, 488370	
2.4.1.101	Ca2+	-	488370	
2.4.1.101	Ca2+	can substitute Mn2+	488371	
2.4.1.101	Ca2+	slight activation	488360, 488368, 488370	
2.4.1.101	Ca2+	the enzyme in testicular fluid has an absolute requirement for either Co2+, or Mn2+, Mg2+ and ca2+. The activity is stimulated by the cations in the above order. The enzyme from cauda epididymal fluid has an absolute requirement for Mn2+ or Ca2+, with Co2+ and Mg2+ being ineffective	658192	
2.4.1.101	Cd2+	78% efficiency	488360	
2.4.1.101	Cd2+	activation	488360, 488368, 488370	
2.4.1.101	Cd2+	can substitute for Mn2+ with 20%	488368	
2.4.1.101	Co2+	91% efficiency	488360