In the previous sections, we have seen that the enzymatic activity of the wild type CM is linearly dependent on the electric field produced by the enzyme. So, could we use electric field as a descriptor for enzymatic activity? We, therefore, focused to construe a correlation between the electric field of the several mutants of Chorismate mutase with their enzymatic activity. In this reference, initially we performed the MD simulations of R90G, R90A and R90K/C88S mutant complexes with TSA. The electric field of enzyme was calculated at a regular interval of 5ns projected along the ether-like C-O bond vector of the TSA, and we reported the averaged value.