How the T cell repertoire becomes peptide and MHC specific.

Abstract excerpt

T cells bearing alphabeta T cell receptors (TCRs) recognize antigens in the form of peptides bound to class I or class II major histocompatibility proteins (MHC). TCRs on mature T cells are usually very specific for both peptide and MHC class and allele. They are picked out from a precursor population in the thymus by MHC-driven positive and negative selection. Here we show that the pool of T cells initially...

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