3.4.21.4	Ca2+	-	707409, 708498, 708554, 708855, 709189, 710243	
3.4.21.4	Ca2+	1 mM, 114% of initial activity	731682	
3.4.21.4	Ca2+	10 mM Ca2+ have a stabilizing effect	679952	
3.4.21.4	Ca2+	2 mM, stabilizing effect	680305	
3.4.21.4	Ca2+	activates at concentrations above 0.4 mM	678896	
3.4.21.4	Ca2+	activates, best at 20 mM	708221	
3.4.21.4	Ca2+	activates, plays an important role in trypsin stabilization	717901	
3.4.21.4	Ca2+	highest activity in presence of 30-50 mM, isoforms A, B, C	668311	
3.4.21.4	Ca2+	required	717278, 717556	
3.4.21.4	Ca2+	required for thermal stability	669029