CVB-D induces expression of apoptosis-related proteins in MGC-803 and MKN28 cells. The protein bands of cleaved Caspase-3, Bax and Bcl-2 were detected using western blotting in CVB-D (0, 30, 60 and 120 µmol/L) treated MGC-803 ( left ); and MKN28 cells ( right ). β-actin was used as the control protein.