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POS phagocytosis by BM-MSCs and RPE cells. The first picture in rows 1 and 2 exhibits the photoreceptor outer segment (POS) with fluorescent microscopy magnified 200X and 400X, respectively. Rows 1 and 3 show bone marrow mesenchymal stem cells (BM-MSCs) incubated with the POS for different time periods. Rows 2 and 4 show RPE cells incubated with the POS for different time periods. The POS phagocytized by the cells is yellow.
