1.1.3.18 Ca2+ relative activity 106% 287626 1.1.3.18 Co2+ catalyzes the decompositon of H2O2 348177 1.1.3.18 Cu2+ catalyzes the decompositon of H2O2 348177 1.1.3.18 Cu2+ cofactor 348174 1.1.3.18 Fe2+ cofactor 348174 1.1.3.18 Fe2+ contains 1 atom non-heme iron per molecule, catalyzes the decomposition of H2O2 287626, 348176, 348177, 348181 1.1.3.18 Mg2+ relative activity 103% 287626