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Transepithelial transport of rhodamine 123 across Caco-2 cell monolayers and the effect of cyclosporine A. Rhodamine 123 (5 µM) was added to the apical side (open columns) or the basolateral side (solid columns) of the monolayers in the presence (+cyclosporine) or absence (control) of 10 µM cyclosporine A at pH 6.8/7.4. Data are the mean ± SD of 3 experiments. *P < 0.05.
