Fig. 4From: Synthesis of novel galactose functionalized gold nanoparticles and its radiosensitizing mechanismAmount of GNPs and GAL-PEG-GNPs uptaken by HepG2 cells at various timepoints. The Abscissa indicates time; the ordinate indicates numbers of GNPs in one cell. Cells were resuspend in 5 mL of 1× PBS and lysed using 5 mL of Aqua Regia (HNO3:HCL = 1:3) solution at RT for 48 h. Concentration of Au in lysates was determined by ICP-MSBack to article page