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Effects of 24 h PRO (A), UB (B) and SB (C) incubation in Caco2 cells, on cell cycle progression (PI-staining). PRO: protoporphyrin, UB: urobilin, SB: stercobilin; ⁎n: significantly different to negative control (p≤0.05), #n: tends to differ from negative control (p≤0.1).
