Fig. 4From: Oleic acid conjugated polymeric photosensitizer for metastatic cancer targeting in photodynamic therapyCellular uptake of OPuC by Confocal Laser Scanning Microscopy images in HCT116 (a, positive cell line) and L929 (b, negative cell line) after treatment PuC or OPuC (5 μg mL− 1 of Ce6) for 4 h. Nucleus were stained DAPI (blue) and accumulated intracellular PuC or OPuC were brighten red. Merge images present the interaction with cells. The scale bar is 10 μmBack to article page