the mononuclear cell lai responses were blocked by monoclonal antibody ( mab ) to monomorphic determinant of class ii major histocompatibility complex ( mhc ) antigens and to t4+ ( leu-3a+ ) and t3+ ( leu-4+ ) t-cell differentiation antigens but not by antibody to class i mhc antigens or t8+ ( leu-2a+ ) antigens .
C0003250
monoclonal antibody
C0003241
antibody