(A) NK92-NKp46low, NK92-NKp46high, YTS KIR2DL1, K562 and 721.221 HLA-Cw4 cells were stained with anti-NKp46 monoclonal antibody followed by staining with Alexa568-Fluor goat anti-mouse IgG secondary antibody. Cells were then analyzed using flow cytometry. (B) NK92-NKp46low, NK92-NKp46+, YTS KIR2DL1, K562, and 721.221 HLA-Cw4 cells were incubated with 50 µg rhodamine-labeled NPs and analyzed using flow cytometry to confirm the internalization of the coated NPs in a NKp46-specific manner. 