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RECEPTORS, ANTIGEN, T-CELL, GAMMA-DELTA
T-cell receptors composed of CD3-associated gamma and delta polypeptide chains and expressed primarily in CD4-/CD8- T-cells. The receptors appear to be preferentially situated in epithelial sites and perhapsplay a role in the recognition of bacterial antigens. The T-cellreceptor gamma/delta chains are separate and not related to the gamma and delta chains which are subunits of CD3 (see antigens, CD3).