Fig. 4.
Effects of Bcl-2 and Bcl-XL overexpression on apoptosis in response to IL-3 withdrawal. Bcl-2–overexpressing (A) or Bcl-XL–overexpressing (B) 32D cell lines, or their vector-transfected control counterparts, were washed free of IL-3 and incubated in fresh, IL-3–depleted medium for the times indicated. The fraction of viable cells at each point was determined as in Figs 1 and2. The results shown are representative of triplicate experiments ±1 SE.