Bax protein levels in different CLL patients. Proteins were extracted from 15 different CLL samples using the lysis buffer. Twenty micrograms of protein were loaded in each lane for SDS-PAGE. The Bax (clone 2D2) antibody was used in 1:1000 dilution and the β-actin antibody was used at 1:10 000 dilution. BDA positive (+) and negative (−) cases are indicated above each lane.