The MHC-binding and gp120-binding functions of CD4 are separable.
D000818:Animals; D001665:Binding Sites; D015704:CD4 Antigens / Q000235:genetics / Q000276:immunology / Q000502:physiology*; D015699:HIV Envelope Protein gp120 / Q000378:metabolism*; D000949:Histocompatibility Antigens Class II / Q000276:immunology / Q000378:metabolism*; D006801:Humans; D007376:Interleukin-2 / Q000096:biosynthesis; D051379:Mice; D009154:Mutation; D013601:T-Lymphocytes / Q000276:immunology; D014162:Transfection
D015704:CD4 Antigens; D015699:HIV Envelope Protein gp120; D000949:Histocompatibility Antigens Class II; D007376:Interleukin-2