T-cell receptor
MOLECULE FOUND ON THE SURFACE OF SOME IMMUNE CELLS
Alpha-beta T-cell antigen receptor; Genes, t-cell receptor; T-cell receptors; Receptors, antigen, t-cell; T-cell antigen receptors; TCRδ1; TCRd1; T cell receptor
The T-cell receptor (TCR) is a protein complex found on the surface of T cells, or T lymphocytes, that is responsible for recognizing fragments of antigen as peptides bound to major histocompatibility complex (MHC) molecules. The binding between TCR and antigen peptides is of relatively low affinity and is degenerate: that is, many TCRs recognize the same antigen peptide and many antigen peptides are recognized by the same TCR.