Expression levels of Bax, Bcl-2, Caspase-3 and Survivin proteins and the gray values of those proteins detected by western blot analysis. Bax, Bcl-2, Caspase-3 and Survivin protein expression analysis following treatment of EJ cells with TAT-Apoptin (0.1, 0.5, 1, 10, 50 and 100 μg/ml) for 48 h. The protein expression level of Bcl-2 (F=550.113, P=0.000) and Survivin (F=16.364, P=0.000) in the EJ cells decreased significantly, while that of Bax (F=97.963, P=0.000) and Caspase-3 (F=311.731, P=0.000) increased significantly with increasing concentration of TAT-Apoptin.