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MDA-MB-231 cells stimulated with the highest concentration (100 µM) of test samples (ABZ, PU, ABZ-PU) for 24 h. (A)—Bright field microscopy was used to observe the cell morphology; (B)—Hoechst staining was employed to assess the specific apoptotic markers (chromatin condensation/DNA fragmentation). Scale bars represent 20 µm.
