3.4.23.18 additional information no metal ion required 30564 3.4.23.18 additional information no activation by HgCl2, NaF, FeCl3, FeCl2, CoCl2, MgCl2, CaCl2, ZnSO4 30569 3.4.23.18 Ca2+ 182.6% activity at 10 mM 752341 3.4.23.18 Co2+ 121.1% activity at 10 mM 752341 3.4.23.18 Mg2+ 152.2% activity at 10 mM 752341 3.4.23.18 Na+ 102.88% activity at 10 mM 752341 3.4.23.18 Ca2+ slight activation at 10 mM 753450 3.4.23.18 Cu2+ 151.2% activity at 10 mM 753450 3.4.23.18 Mg2+ slight activation at 10 mM 753450 3.4.23.18 Mn2+ 140.1% activity at 10 mM 753450