Alterations in CD4-binding regions of the MHC class II molecule I-Ek do not impede CD4+ T cell development.

Abstract excerpt

The T cell coreceptors CD4 and CD8 enhance T cell responses to TCR signals by participating in complexes containing TCR, coreceptor, and MHC molecules. These ternary complexes are also hypothesized to play a seminal role during T cell development, although the precise timing, frequency, and consequences of TCR-coreceptor-MHC interactions during positive selection and lineage commitment remain unclear. To address...

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