Figure 4From: Establishment and characterization of multicellular spheroids from a human glioma cell line; Implications for tumor therapyApoptotsis by flow cytometry. Bivariate plots of Propidium iodide staining (revealing non-specific membrane damage) and Annexin V binding (PS externalization) studied by flow cytometry showing the dynamics of apoptotic cells as a function of age in culture.Back to article page