11F2 recognizes the human γ/δ T cell receptor (TCR). The T cell receptor is a heterodimeric glycoprotein associated with the CD3 antigen. The TCR consists of a α and a β chain (TCRα/β) or a γ and a δ chain (TCRγ/δ). Clone 11F2 reacts with a framework epitope of the γ/δ T cell–receptor. The γ and δ TCR chains are composed of constant and variable regions, each encoded by distinct gene segments. The γ chain forms either disulfide-linked or non-disulfide-linked heterodimers with the δ-subunit. The γ/δ T cell–receptor is present on a subset of T lymphocytes in peripheral blood, intestinal epithelium, lymph node, thymus, and spleen. TCR γ/δ is involved in the recognition of certain bacterial, self-CD1 molecule, and tumor antigens bound to MHC class I. γ/δ T cells are mainly CD4 negative and CD8 negative. T cells expressing the γ/δ TCR have been shown to play a role in oral tolerance, innate immune response for some tumor cells, and autoimmune disease. Antigen presentation by γ/δ T cells has been reported.
Reagent can be used for immunophenotyping by flow cytometry. Abnormal numbers of cells expressing this antigen or aberrant expression levels of the antigen can be expected in some disease states. It is important to understand the normal expression pattern for this antigen and its relationship to expression of other relevant antigens in order to perform appropriate analysis. Expression of TCRγ/δ may be used as aid to diagnostic in the characterization of samples from individuals suspected with hematologic neoplasia.