3.4.24.67 Ca2+ - 668840 3.4.24.67 Ca2+ 450% activation at 2 mM 683486 3.4.24.67 Calcium 0.00286-0.00296 mg/mg protein, inductively coupled plasma emission analysis 31416 3.4.24.67 Cu2+ high concentrations reactivate EDTA-inactivated apoenzyme 668840 3.4.24.67 Magnesium 0.00063-0.00076 mg/mg protein, inductively coupled plasma emission analysis 31416 3.4.24.67 Mg2+ - 668840 3.4.24.67 Mg2+ 180% activation at 2 mM 683486 3.4.24.67 additional information copper barely detectable by atom absorption analysis and no cobalt, iron or manganese detected by inductively coupled plasma emission analysis 31416 3.4.24.67 additional information no effect by Zn2+ at 5 mM 683486 3.4.24.67 Zinc 0.00127-0.00143 mg/mg protein, inductively coupled plasma emission analysis 31416 3.4.24.67 Zn2+ low concentrations reactivate EDTA-inactivated apoenzyme 668840 3.4.24.67 Zn2+ zinc endopeptidase 683391