Fig. 9. Flow cytometric analysis of MDA-MB-231 cells after 72 h treatment using Annexin V/propidium iodide staining, showing (a) vehicle followed by irradiation, (b) vehicle without irradiation, (c) [Ru(thd)(tpy)(py)]PF₆ (6 μM), (d) H₂O₂ (500 mM); (e) 5 (10 μM) without irradiation and (f) 5 (10 μM) with irradiation. Data are indicative of three independent experiments.