The T-cell co-receptor CD4 is required for T-cell activation, and it may be involved in stabilization of the T-cell receptor and class II major histocompatibility complexes during antigen ...

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 ...