1.2.1.65 Cu2+ enhances NahV activity by 63% activity 691830 1.2.1.65 Fe2+ enhances NahF activity by 40% activity 691830 1.2.1.65 Fe2+ enhances NahV activity by 152% 691830 1.2.1.65 additional information Zn2+ has no effect on NahF activity 691830 1.2.1.65 Zn2+ enhances NahV activity by 14% activity 691830 1.2.1.65 Ca2+ the enzyme contains 1.8 mol/mol of enzyme 741638 1.2.1.65 Fe2+ the enzyme contains 0.4 mol/mol of enzyme 741638 1.2.1.65 K+ 44% activating at 200 mM 741638 1.2.1.65 Mg2+ the enzyme contains 0.3 mol/mol of enzyme 741638 1.2.1.65 additional information external addition of Ca2+, Mg2+, Fe2+ and Fe3+ at 10 mM, either as sulfate or chloride salts, fail to show an increase in the enzyme activity 741638