3.4.21.9	Ca2+	50 mM, 3fold activation of hydrolysis of substrates of the general type GD4KX	667759	
3.4.21.9	Ca2+	CaCl2 enhances enzyme activity at 0.02 mM	732883	
3.4.21.9	Ca2+	optimal at 0.02mM, inhibitory at 10 mM	683172	
3.4.21.9	Ca2+	required	717409, 718359	
3.4.21.9	CoCl2	activates	95584	
3.4.21.9	HgCl2	activates	95584	
3.4.21.9	K+	activating, thiobenzyl benzyloxycarbonyl-L-lysinate as non-specific substrate	683172	
3.4.21.9	Na+	activating, thiobenzyl benzyloxycarbonyl-L-lysinate as non-specific substrate	683172