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Mitochondrial superoxide production in NRK-52E cells treated with 0.75 mM polymyxin B in the absence and presence of 10 mM methionine. (A) Detection of cellular mitochondrial superoxide using MitoSOX red dye. (B) Measurements of mitochondrial superoxide production presented as mean ± SD (n = 3). ****, P < 0.0001 (compared to control samples).
