(B) HeLa cells were treated with control siRNA, Bim siRNA + control siRNA, control siRNA + Beclin 1 siRNA, or Bim siRNA + Beclin 1 siRNA. After 24 hr, cells were transfected with GFP-PX for 24 hr. GFP-PX vesicles were assessed with a confocal microscope. Data are shown as mean ± SD. ∗∗p < 0.01. Arrows label cells with increased number/size of GFP-PX vesicles. 