Figure 1

Immunocytochemistry. Cultured cells were incubated in 1 μ M staurosporine for 24 hours to induce apoptosis through caspase-3 activation (red) (B). Control cells that had not been incubated in staurosporine were essentially caspase-3 negative (A). Cell nuclei were counterstained with DAPI (blue). Original magnification: ×200. Photomicrographs are representative of three (A) and five (B) samples.