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Visualization and quantification of γH2AX (γH2AX: green, DAPI: gray) as an indicator of DDR induced by 1–3 (0.5 μM), phenanthriplatin (0.5 μM), oxaliplatin (10 μM), cisplatin (10 μM), and ActD (5 nM) at 24 h treatments in A549 cells (n = 3). Standard quantification procedure described in the Experimental Section. Scale bar = 10 μm. ***p < 0.05, N.S. p > 0.05.
