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Induction of apoptosis by flax straw extract in MCF-7 cells. Detection of externalized phosphatidylserine by annexin V-fluorescein (right column). Nuclei were stained with Hoechst 33342 (left column). Results were visualized by fluorescence microscope and compared with those observed in the presence of the known apoptosis inducer staurosporine (1 μM).
