Phosphoantigen activation induces surface translocation of intracellular CD94/NKG2A class I receptor on CD94- peripheral Vgamma9 Vdelta2 T cells but not on CD94- thymic or mature gammadelta T cell clones..     ///    In the present study we show that most CD94- Vgamma9Vdelta2 PBL ex vivo express an intracellular pool of CD94/NKG2-A receptors that is translocated to the cell surface upon activation by phosphoantigens or IL-2.     ///    Altogether these results provide new insights into the regulation of CD94/NKG2-A expression on T lymphocytes and suggest the existence of distinct mechanisms controlling in vivo and in vitro induction of IR on these cells..     ///    "They also express various MHC class I-specific inhibitory receptors (IR), in particular CD94/ NKG2-A heterodimers, which participate in the fine tuning of their TCR-mediated activation threshold. "    ///    "In stark contrast, intracellular CD94/NKG2-A complexes are undetectable in CD94- thymus or PBL-derived mature Vdelta2 T cell clones, and no surface induction is observed following phosphoantigen activation of T cell clones. "