Research Article

Antimicrobial, Antioxidant, Anti-Inflammatory, and Cytotoxic Activities of Propolis from the Stingless Bee Tetragonisca fiebrigi (Jataí)

Figure 4

Cytotoxic action of EEP from T. fiebrigi against the K562 erythroleukemia cell line. (a) Representative diagrams obtained by flow cytometry of cells stained with annexin V-FITC/PI: the lower left quadrant (PI/An) represents the viable cells; the lower right quadrant (PI/An+) represents the apoptotic cells; the upper left quadrant (PI+/An) represents cells in necrosis; and the upper right quadrant (PI+/An+) represents cells in secondary necrosis. (b) Frequency of cell death, obtained from the corresponding diagrams of tested concentrations. * treated group versus control viable cells. treated group versus control necrosis.