Cholinesterase assay for monitoring the kinetics of the JD6. 5 organophosphorus acid anhydrase in detoxification of diisopropylfluorophosphate. Final report, January-June 1988
1992
In the present studies, cholinesterase was used for monitoring the enzymatic activities of the JD6.5 organophosphorus acid anhydrase. The kinetic data indicated that: (1) the first order of kinetic constants (k) and Vmax values of the enzymatic reactions increased as the concentrations of the enzyme increased; (2) while the half-life (tl/2) of diisopropylfluorophosphate (DFP) hydrolysis decreased as the enzyme concentrations increased; (3) the minimum time required for hydrolysis of 9mM of DFP was 3 min at the concentrations of the enzyme present; Km values of DFP were found to be in range of 5mM; and (4) both MnCl2 and NaCl were found to be required for the optimal activity of the enzyme.
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