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Induction of apoptosis by peptidic cyclin/cdk2 antagonists. (A) Fluorescence microscopy of 4′,6-diamidino-2-phenylindole-stained U2OS cells treated with the indicated peptides. (B) DNA content, measured by fluorescence-activated cell sorting after staining with propidium iodide, of U2OS cells treated with indicated peptides for 6 hr at final concentration of 30 μM.
