Two monoclonal antibodies (mAb) directed to the dual reactive cytolytic T lymphocyte clone OH8 (Db + H-Y and H-2d) were established. Analysis by cell surface staining and immunoprecipitation of radiolabeled surface molecules of OH8 followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed that both mAb recognized an identical heterodimeric, clonotypic structure on OH8 cells...