Fig. 3.
Steady-state levels of pro- and anti-apoptotic proteins and caspases in etoposide-treated control and mtDNA-depleted C2C12 cells. Cells treated with (25 µM for 4 h) or without etoposide were used for isolating the mitochondrial and cytosolic fractions as described in the Materials and methods section. 30 µg each of mitochondrial (A and B) and cytosolic (C) proteins was subjected to Western blot analysis using indicated antibodies. The immunoblot was developed using the Pierce Super signal West Femto substrate kit as described in the Materials and methods.