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BACKGROUND
Resistance to protoporphyrinogen oxidase (PPO)‐inhibiting herbicides is endowed primarily by target‐site mutations at the PPX2 gene that compromise binding of the herbicide to the catalytic domain. In Amaranthus spp. PPX2, the most prevalent target mutations are deletion of the G210 codon, and the R128G and G339A substitutions. These mutations strongly affect the dynamic of the PPO2 binding...
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