What chemical process must occur for paraquat dichloride to become its active form PQ+?
Answer
Reduction
Paraquat exists initially as a divalent cation known as PQ2+, which cannot effectively be taken up by dopamine neurons. For the chemical to exert toxic effects, it must undergo a redox cycling process. This reaction is typically catalyzed by enzymes like NADPH oxidase located on brain microglia. Through this reduction process, the chemical is converted into the monovalent ion PQ+, which functions as a protoxicant capable of entering cells and initiating a destructive cascade of oxidative damage.
Related Questions
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