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Fluorescence microscopic images of bone-marrow-derived dendritic cells incubated with 25 µg/mL fluorescently-labelled amino-dextran nanoparticles (aDNPs) for 24 h at 37 °C; (a) no treatment, (b) unloaded amino-dextran nanoparticle (aDNP), (c) CpG-adsorbed aDNP, and (d) CpG-conjugated aDNP. The nucleus was stained with Hoechst 33342 (blue), and fluorescently-labelled aDNP (red). Optical maginification, 40 ×. Scale bar, 10 µm.
