Carboxylesterase activities for the wild-type and mutant forms of the eight H. armigera esterases with 1-naphthyl acetate as substrate.

Specific activities (at 500 µM substrate) (sec−1) and estimates of Km (µM) and kcat (sec−1) are shown. Estimates are based on an average of six replicates and standard errors for these estimates are also given in brackets. Values for the wild-type and corresponding mutants of L. cuprina E3 are also shown as controls. na, value could not be calculated.