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αβ T cell receptors (TCRs) have traditionally been viewed as receptors for peptide antigens presented by either Major Histocompatibility Complex (MHC) class I (for CD8 T cells) or MHC class II (for CD4 T cells) antigen-presenting molecules. However, it is now clear that some T cell lineages express TCRs that are specialized for recognition of lipid-based antigens presented by the MHC class I-like...
A great paradox in cellular immunology is how T cell allorecognition exists at high frequencies (up to 10%) despite the stringent requirements of discriminating ‘self’ from ‘non-self’ imposed by MHC restriction. Thus, in tissue transplantation, a substantial proportion of the recipient's T cells will have the ability to recognize the graft and instigate an immune response against the transplanted...
Despite a potential repertoire of >10 15 αβ T cell receptors (TcR), the HLA B8-restricted cytolytic T cell response to a latent antigen of Epstein-Barr virus (EBV) is strikingly limited in the TcR sequences that are selected. Even in unrelated individuals this response is dominated by a single highly restricted TcR clonotype that selects identical combinations of hypervariable Vα,...
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