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DAPI, a fluorescent dye, can penetrate the cell membrane and bind to the double-stranded DNA in the nucleus. The morphological changes were observed under a fluorescence microscope (×200). (a) Control group, (b) model group, (c) verapamil 10−11 M group, (d) rosamultin 10−11 M group, (e) rosamultin 10−12 M group, and (f) rosamultin 10−13 M group.
