Figure 3.
Priming correlates with sensitivity to BH3-mimetics. The interaction of anti- and pro-apoptotic BCL-2 proteins was investigated in a selection of ten cell lines with varying sensitivities to BH3-mimetics. Immunoprecipitation of BCL-2, BCL-XL and MCL-1 was performed in untreated cell lysates followed by analysis of binding of pro-apoptotic BCL-2 proteins (BIM, NOXA, BAX and BAK) using Western blotting. Protein G beads without primary antibody were used to control for unspecific binding. Staining with BCL-2, BCL-XL, MCL-1 and GAPDH was performed to demonstrate efficient immunoprecipitation and equal protein loading, respectively. Representative western blots of two independent experiments are shown.
