2.4.1.297 1,10-phenanthroline 1 mM, 84% residual activity 62 2.4.1.297 4-chloromercuribenzoate 1 mM, 4% residual activity 388 2.4.1.297 Co2+ 1 mM, 31% residual activity 23 2.4.1.297 Cu2+ 1 mM, 10% residual activity 19 2.4.1.297 additional information not inhibitory: EDTA at 1 mM 2 2.4.1.297 N-ethylmaleimide 1 mM, 16.4% residual activity 49 2.4.1.297 Zn2+ 1 mM, 3.5% residual activity 14