Cytotoxicity assay of the purified CD8⁺IFN-γ⁺ and CD8⁺IFN-γ⁻ or CD4⁺IFN-γ⁺ and CD4⁺IFN-γ⁻ after sensitization with autologous EBV BLCL of donor B.

(A) Specific cytolytic potential of the autologous and allogeneic EBV BLCL of the CD8⁺IFN-γ⁺. (B) No significant cytolytic activity of the CD8⁺IFN-γ⁻subpopulation against autologous or allogeneic EBV BLCL. (C, D) No cytolytic activity of the CD4⁺IFN-γ⁺ or CD4⁺IFN-γ⁻ subpopulations against autologous and allogeneic EBV-transformed B-cell targets.