Representative data of double staining for annexin V-propidium iodide (PI) uptake from test groups and control by fluorescence activated cell sorting (FACS), after 24 hours of incubation. The percentage of PI-negative and annexin V-positive cells that were in early apoptosis, and PI positive and annexin V-positive cells that were dead or in end-stage apoptosis, are represented in each quadrant.
Abbreviation: FITC, fluorescein isothiocyanate.