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Figure 5: Internalization of green fluorescent FITC-TSw, respectively, FITC-TSc (50 µg/mL) by NHDF analyzed via laser-scanning confocal microscopy after incubation of 3 h, 6 h, 12 h, and 24 h. Blue fluorescence: DAPI-stained nuclei; red fluorescence: endosomes labeled with Dextran-TexasRed; yellow fluorescence: colocalization of FITC-TSw, respectively, FITC-TSc and Dextran-TexasRed within the endosomes.