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In vivo distribution of GE11-Se NPs in xenograft KYSE-150 cancer nude mice. In vivo fluorescence imaging of the esophageal cancer-bearing nude mouse after tail intravenous injection of (A) coumarin-6-loaded Chi-Se NPs, (B) coumarin-6-loaded GE11-Se NPs, and (C) coumarin-6-loaded GE11-Se NPs in the presence of large amounts of free GE11 peptide. The white squares indicated the location of tumor.
