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Uptake analysis of the fluorescence of RBITC-HP, RBITC-QA and RBITC-QAPS (5 µM) in CACO-2 cells by confocal microscopy after 30 min of exposure. The figure shows the internalization by CACO-2 cells of the different labelled beta-cyclodextrins in comparison with untreated cells or treated with rhodamine not conjugated (blue channel—nuclear stain; red channel—rhodamine alone or conjugated with beta-cyclodextrins).
