1.1.1.118 Ca2+ maximally active at 20 mM 639110 1.1.1.118 Mg2+ maximally active at 20 mM 639110 1.1.1.118 Mn2+ maximally active at 20 mM 639110 1.1.1.118 additional information Zn2+ is partially effective, whereas Ni2+, Cd2+ and univalent cations are ineffective in promoting enzyme reactivation 639110 1.1.1.118 Zn2+ - 763638