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Effect of the ruthenium complexes treatment towards mammary cancer cells. a, c, e: DIC (differential interferential contrast), b, d, e: fluorescence labeling of the nuclei by Hoechst 33258 of the 4T1 cells after treatment by 8 µM [Ru(dip)2(CH3bpy-DCU)]2+ (c, d) or [Ru(dip)2(bpy)]2+ (e, f), for 24 h. a and b show control cells
