3.4.23.16	Ca2+	dependent on	717185	
3.4.23.16	additional information	the activity of the enzyme is dependent on the ionic strength of the reaction mixture, rather than on the binding of a specific ion to an enzymatic site	648124	
3.4.23.16	Na+	role of Na+ ions in stabilizing the active site	666873	
3.4.23.16	NaCl	the protease works more efficiently at high salt concentrations, 2 M NaCl, than at lower salt concentrations	648137