370701.fig.004a
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370701.fig.004b
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Figure 4: In vivo fluorescence imaging of U87MG tumor-bearing nude mice at 1, 2, and 4 hours after intravenous injection of 0.5 nmol IRDye800-RGD2 or IRDye800-PEG4-RGD2. Fluorescence signal from IRDye800 is pseudocolored (data from Liu et al. [61]).