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Localization of HFn. Confocal images of SKBR3, BT474, and MCF-7 cells incubated for 15 min, 1 h, 3 h, and 24 h at 37 °C in complete cell culture medium with FITC-labelled HFn nanoparticles (green; 100 μg/mL). Nuclei were stained with DAPI (blue). Scale bar = 10 µm.
