Anisotropy 2 Cell Line, Tumor 2 Fluorescence Resonance Energy Transfer 2 Fluorescence microscopy 2 Fluorescent Dyes 2 Growth factor receptors 2 Humans 2 Microscopy, Fluorescence 2 Nanoparticles 2 Nanostructures 2 Photons 2 Quantum Dots 2 Receptors, Growth Factor 2 Signal Transduction 2 Transferrin 2 anisotropy 2 article 2 cancer cell culture 2 confocal laser microscopy 2 epidermal growth factor receptor 2 fluorescence 2 fluorescence lifetime imaging microscopy 2 fluorescence microscopy 2 fluorescence resonance energy transfer 2 fluorescent dye 2 green fluorescent protein 2 growth factor receptor 2 human 2 human cell 2 hybrid protein 2