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Analysis of apoptotic and necrotic effects in hTBME and BME cells. The established hTBME cell line at passage 60 (right) and BME cell line at passage 5 (left) were stained with annexin V and propidium iodide (PI) and analyzed by flow cytometry. Four populations of cells were identified: B1 [necrotic (PI) only], B2 [apoptotic/necrotic (annexin V + PI)], B3 [live (no stain)], and B4 [apoptotic (annexin V only)]
