Functional epitope analysis of the human CD4 molecule. The MHC class II-dependent activation of resting T cells is inhibited by monoclonal antibodies to CD4 regardless whether or not they recognize epitopes involved in the binding of MHC class II or HIV gp120. - Merkenschlager, M; Buck, D; Beverley, P; Sattentau, Q (Journal of Immunology, 1990)