title: Human T-B lymphoblast hybrids express HLA-DR specificities not expressed by either parent.
mesh_terms: D000954:Antigens, Surface / Q000235:genetics; D001402:B-Lymphocytes / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000235:genetics; D006650:Histocompatibility Testing; D006801:Humans; D006822:Hybrid Cells / Q000276:immunology*; D010641:Phenotype; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000954:Antigens, Surface; D000949:Histocompatibility Antigens Class II