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. 2015 Oct 9;13:67. doi: 10.1186/s12951-015-0129-x

Fig. 4.

Fig. 4

Amount 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-MS