... 20Y118F 60 ± 3 5.2 ± 0.1 11.5Reversions in R7 to native amino acidsT132I 1470 ± 30 0.74 ± 0.04 1990V135I 2100 ± 90 1.5 ± 0.1 1400F31Y 1080 ± 40 0.38 ± 0.01 2840A114V 2100 ± 80 3.2 ± 0.2 660 All ... imparted by mutations of the targetenzyme (target-site mechanism of resistance) [60] , butthere is, as yet, no documented case of a plant specieshaving native or evolved tolerance to glyphosate ... in 5-enolpyruv-ylshikimate-3-phosphate synthase from Escherichia coli.J Biol Chem 284, 9854–9 860. 42 Barry GF & Kishore GA (1995) Glyphosate tolerantplants. US Patent 5,463,175.43 Nishiya...