3.1.3.58 Co2+ 5 mM, divalent cation required for maximal activity, doubles the rate of glucose 6-phosphate hydrolysis 646416 3.1.3.58 Co2+ activates 655643 3.1.3.58 Mg2+ 5 mM, divalent cation required for maximal activity, triples the rate of glucose 6-phosphate hydrolysis 646416 3.1.3.58 Mg2+ activates 655643 3.1.3.58 Mn2+ activates 655643 3.1.3.58 additional information Mn2+ and Ni2+ have no effect on enzyme activity 646416 3.1.3.58 Ni2+ activates 655643