Fig. 5

Intracellular fluorescence of Cy7-conjugated Prot.1 (green), Prot.2 (yellow), Prot.1/RSP (blue) and Prot.2/RSP (red) NPs of Neuro-2α cells by FACS (a). Fluorescence microscopy images of cellular uptake of Cy7-conjugated (cell membrane, red) of Prot.1 (b) and Prot.2 (c) and Hoechst dye (cell nucleus, blue) in Neuro-2α following 24 h exposure