RSO model. Model construction was based on Michaelis-Menten equation. A to D represent the RSO model of P106L mutant, P106S mutant from goosegrass (Baerson et al., 2002), G101A mutant from petunia (Padgette et al., 1991), and wild-type OsEPSPS, respectively. Calculations for A and D were carried out using the kinetic parameters shown in Table II. Calculations for B and C were carried out using the kinetic parameters reported previously (Padgette et al., 1991; Baerson et al., 2002). Sections 1 and 3 represent the surface charts generated by Excel from Equations 1 and 2, respectively. Sections 2 and 4 represent the contour charts of 1 and 3, respectively. Gly, Abbreviation of glyphosate.