Biological function and substrate unknown. However, it is capable of acting on phosphorus anhydride bonds (such as phosphorus-halide and phosphorus-cyanide) in organophosphorus compounds (including nerve gases). diisopropyl fluorophosphate + H2O = diisopropyl phosphate + fluoride + 2 H(+) Binds 2 calcium ions per subunit. Inhibited by chelating agents. Optimum pH is 8.0. Optimum temperature is 35 degrees Celsius. Monomer. Has potential application in bio-remediation by detoxification of organo-phosphates used in insecticides or nerve agents used in chemical warfare such as soman, tabun and sarin.