Fig. 6.
Proliferative response of purified allogeneic CD4+ and/or CD8+ T cells as well as PBMCs not further purified to γ-irradiated native and CD40-stimulated B-CLL cells. Different CD4/CD8 ratios were tested. [3H] Thymidine incorporation was assessed for the last 12 hours of a 3-day culture and determined in cpm ± SD of triplicate determinations. The results shown are from one experiment and are representative for three independent experiments.