3.1.3.18 Cl- activates at chloride ion concentration up to 50 mM 652557 3.1.3.18 Cl- the activity is 11fold increased, cooperative effect of Cl- and Mg2+ 651727 3.1.3.18 dithiothreitol - 750613 3.1.3.18 KCl below 50 mM 652557 3.1.3.18 tris(2-carboxyethyl)phosphine - 750613