Analysis Note

Typically used at a concentration of 0.10 mM. A safer alternative inhibitor for serine protease is phenylmethylsulfonyl fluoride (PMSF).

Application

Diisopropylfluorophosphate has been used:in combination with inactivated thrombin in Affi-Gel 10 column for the purification of recombinant human thrombomodulin with its chondroitin sulfate chain (shrTMCSA)for inducing status epilepticus (SE) in adult ratsas an irreversible serine protease inhibitor in human neutrophil subcellular fractions

Biochem/physiol Actions

Potent inhibitor of serine proteases such as trypsin and chymotrypsin, and of acetylcholinesterase; also inhibits cathepsin G, cholinesterase, coagulation factor Xa, leucocyte elastase, pancreatic elastase, tissue kallikrein, plasmin, subtilisin, and thrombin. Inhibition of acetylcholinesterase makes this compound especially toxic. Inhibits apoptosis induced by ricin and bacterial toxins.

Other Notes

Stored properly at 2-8°C, in an unopened bottle, DIFP should be stable for a minimum of two years. DIFPis unstable when exposed to moisture. DIFP will develop a dark yellow color upon decomposition.