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a-d Immunolocalization of p21Cip1/Waf1/Sdi1 in A549 cells after treatment with etoposide - fluorescence microscopic examination (p21Cip1/Waf1/Sdi1 indirect labeling, secondary antibody was goat anti-mouse IgG-Alexa Fluor 488®). a Control cells, b 0.75 μM etoposide, c 1.5 μM etoposide, d 3 μM etoposide. Nuclei were counterstained with DAPI. Results are indicative of three independent experiments. Bar 50 μm.
