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Intracellular uptake of ginger PDNPs purified under different pH. A431 cells were either mock-treated or incubated with Nile red-labeled ginger PDNPs for 5 h. Cells were fixed and counterstained with DAPI. Cytoplasmic fluorescence was detectable in cells treated with ginger PDNPs without significant difference in fluorescence intensity or number of fluorescing cells between PDNPs isolated under different pH conditions. Scale bar-20 μm.
