1.1.1.136 Co2+ inhibition 725107 1.1.1.136 Fe3+ inhibition 725107 1.1.1.136 K+ enhancing activity 725107 1.1.1.136 K+ or NH4+, required 656241 1.1.1.136 Mg2+ - 667737 1.1.1.136 Mn2+ inhibition 725107 1.1.1.136 NH4+ enhancing activity 725107 1.1.1.136 Ni2+ inhibition 725107 1.1.1.136 Zn2+ inhibition 725107