5.3.3.14 3-decynoyl-N-acetylcysteamine covalent modification of ative site residue H70 5487 5.3.3.14 3-decynoyl-N-acetylcysteamine strong inhibition of both dehydrase activity of EC 4.2.1.60 and isomerase activity of enzyme 5487 5.3.3.14 3-decynoyl-N-acetylcysteamine irreversible inactivation of both dehydrase activity of EC 4.2.1.60 and isomerase activity of enzyme, inhibition occurs through isomerization to the allene and subsequent covalent modification of enzyme 5487 5.3.3.14 3-dodecynoyl-N-acetylcysteamine - 8004 5.3.3.14 3-nonynoyl-N-acetylcysteamine noncompetitive 45168 5.3.3.14 3-octynoyl-N-acetylcysteamine 24% inhibition at 0.005 mM 12355 5.3.3.14 3-undecynoyl-N-acetylcysteamine - 59211 5.3.3.14 additional information not inhibitory: iodoacetic acid, chloroacetic acid, iodoacetamide, N-ethylmaleimide 2 5.3.3.14 p-chloromercuribenzoate 0.5 mM, 35% inhibition 43