ABZ treatment potentiates apoptosis in irradiated melanoma and SCLC cells. A2058 and H1530 cells were treated with 500 nM ABZ, 2 Gy or 10 Gy radiation, or indicted combination. Proteins were analyzed by Western blot hybridization with an antibody against cleaved PARP (C-PARP) or cleaved caspase 9 (CC9) antibody. Actin served as loading control. NT = No treatment.