A λ clone containing the Dp gene was used to transform L cells. The Dp product expressed was identified by two-dimensional gel electrophoreis and flow cytometry. The Dp product expressed by the L cells was recognized by DP-specific flow cytometry. The Dp product expressed by the L cells was recognized by Dp-specific but not Kp-specific killer T cells. This killing was inhibited by monoclonal antibodies specific for Dp but not Kp or Kk antigens. Similarly, lymphocytic choriomeningitis virus (LCMV) killer T cells from B 10.P mice were able to kill LCMV-infected L12a cells, but not LCMV-infected Ltk+. Again only Dp monoclonal antibodies could inhibit this killing.
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