Antigen recognition.
D000818:Animals; D000937:Antigen-Antibody Reactions; D000938:Antigen-Presenting Cells / Q000276:immunology; D000941:Antigens / Q000276:immunology*; D005786:Gene Expression Regulation; D005803:Genes, Immunoglobulin; D006801:Humans; D008285:Major Histocompatibility Complex; D011948:Receptors, Antigen, T-Cell
D000941:Antigens; D011948:Receptors, Antigen, T-Cell