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

(A) Specific cytotoxic potential of the autologous target of the CD8⁺IFN-γ⁺ cells; allogeneic BLCL are not recognized. (B) Little anti-EBV or anti-alloreactive cytolytic activity of the CD8⁺IFN-γ⁻ subpopulation.