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The fluorescent image patterns of total and apoptotic cells in mouse embryos. (A-C; ×400) Total cells were determined by DAPI (blue), (D-F; ×400) apoptotic cells were confirmed by TUNEL (green), and (G-I; ×400) colocalization with DAPI is indicated as blue-green. DAPI, 4', 6-diamidino-2-phenylindole; TUNEL, terminal deoxynucleotidyl transferase (TDT) mediated dUTP nick end labeling; EM, electron microscopy; TPS, thin plastic strip.
