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Fig. 5. (A) Schematic mechanism of internalization of BIOT-TAT/VIM PEG-AuNPs. Electron micrographs of F98 cancer cells treated with BIOT-TAT-PEG-AuNPs (B) and with BIOT-VIM-PEG-AuNPs (C); electron micrographs of MIA PACA-2 cancer cells treated with BIOT-TAT-PEG-AuNPs (D) and BIOT-VIM-PEG-AuNPs (E).