title: Antigen-processing revisited--a foreword.
mesh_terms: D000818:Animals; D000941:Antigens / Q000235:genetics*; D001402:B-Lymphocytes / Q000276:immunology; D006680:HLA Antigens / Q000235:genetics; D008285:Major Histocompatibility Complex; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000941:Antigens; D006680:HLA Antigens