1.1.1.207 Hg2+ almost complete inhibition at 0.25 mM 1.1.1.207 iodoacetamide almost complete inhibition at 0.25 mM 1.1.1.207 N-ethylmaleimide almost complete inhibition at 0.25 mM 1.1.1.207 p-hydroxymercuribenzoate almost complete inhibition at 0.05 mM