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Confocal microscopy of PEG17-PPS28-PBI-PPS28-PEG17 polymersomes within RAW 264.7 macrophages. Cells were incubated with polymersomes for 4 h, washed with fresh media to remove polymersomes that had not been endocytosed and subsequently imaged at timepoints of 4 h and 48 h. Control samples were incubated for 48 h in media without polymersomes.
