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A549 cells with control nuclei labeled with DAPI and treated with DN and OA at different dosages. (a) Control, (b) 10 µM DN and OA, (c) 20 µM DN and OA, and (d) 30 µM DN and OA. Note that untreated cells have round nuclei and a less intense blue coloring. After exposure to both DN and OA, cells showed signs of apoptosis, including nuclear breakage and noticeably increased blue fluorescence light. The scale bar displayed 50 µm.
