Fig. 11From: Intracellular tracking of drug release from pH-sensitive polymeric nanoparticles via FRET for synergistic chemo-photodynamic therapyHistological analysis of different organs in tumor-bearing mice (a). TUNEL and the Ki-67 (b) immunohistochemical (IHC) staining of cancer tissues, the brown areas figure TUNEL-positive staining or Ki-67-positiveBack to article page