Cytolytic activity of in vivo-generated CTL against allogeneic and syngeneic target cells. WT (○) and Tg-KIR2DL3 (•) mice of H-2^k haplotype were injected into the hind foot pads with irradiated splenocytes from WT H-2^b mice. Draining lymph node cells were tested against WT (A) and Tg-HLA-Cw3 (C) of H-2^b haplotype and WT H-2^k (B) ConA blasts. Data shown are representative from 3 independent experiments.