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Fluorescence microscopy images showing intracellular accumulation of (A) SYTOXTM green and 4 kDa TRITC-dextran and (B) SYTOXTM green and 20 kDa TRITC-dextran after exposure to USMB. “TRITC” indicates a fluorophore with red color. Blue in overlay images: DAPI, scale bar: 10 μm.
