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(a) Confocal imaging of RAW 264.7 cells treated with 100 μg/mL R-BSA@PSiNPs for 24 h (scale bar = 40 μm); (b) intracellular MFI from ∼100 cells treated with 100 μg/mL R-BSA@PSiNPs or R-BSA at the equivalent concentration; and (c) flow cytometry analysis of RAW 264.7 cells treated with 100 μg/mL R-BSA@PSiNPs and R-BSA at the equivalent concentration for 24 h.
