EGF and neoplasm: In biomarker detection, AuNPs-peptide conjugates have been used for detecting circulating tumor cells in human peripheral blood using an epidermal growth factor (EGF) peptide [23]; in bioimaging, they have been used to target β-amyloid fibers in Sprague-Dawley rats using an amphipathic peptide (aminoacidic sequence: CLPFFD) [24].