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(a) Bright field, fluorescence, and merged confocal images of HT29 and A549 cells after incubation with 1 (4 μM) or 3 (12 μM) for 1 h. (b) Fluorescence intensity profiles of the cells being treated under these conditions determined by flow cytometry. (c) Corresponding quantified intracellular fluorescence intensities. Data are expressed as the mean ± SD of three independent experiments.
