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Role of respiratory chain complexes in bipyridyl herbicide–induced H2O2 production in primary midbrain cultures. Cultures were exposed to PQ, DQ, or BV at 300μM for 8 h in the presence of respiratory chain inhibitors. Data expressed as percent control of vehicle for each bipyridyl herbicide group, mean + SEM, n =3. Bars with different letters indicate statistical significance from one another (p < 0.05, one-way ANOVA with Tukey's posttest).
