The interactions between antigen-presenting cells (APC) and T lymphocytes.
D000818:Animals; D001360:Avidin / Q000276:immunology; D005802:Genes, MHC Class II; D006183:H-2 Antigens / Q000235:genetics; D000949:Histocompatibility Antigens Class II / Q000276:immunology / Q000502:physiology; D011948:Receptors, Antigen, T-Cell / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*
D006183:H-2 Antigens; D000949:Histocompatibility Antigens Class II; D011948:Receptors, Antigen, T-Cell; D001360:Avidin