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Sulfide induces a reductive shift in HT29 cells.A, acute exposure to 100 μM Na2S for 4 h resulted in a small but statistically significant reductive shift in the CoQ pool (n = 3). B, chronic exposure of HT29 cells to 100 ppm H2S for 24 h led to a marked reductive shift in the CoQ pool (n = 3 or 4).
