S3). Immunohistochemical analysis showed a dense lymphocytic infiltration of the lamina propria positive for T-cell receptor (TCR) α, CD3, CD4, and granzyme B but which did not express TRBC1 ...

CD4 interacts with both the engaged TCR and with invariant sites on the engaged MHC molecules 5,6,7.Inside the cell, the cytoplasmic tail of CD4 binds the src-tyrosine kinase Lck (ref. 8), a ...