by using well-characterized monoclonal antibodies , hu-20 , hok7 ( 1e4 ) and hu-18 , which specifically recognize either common epitopes of hla-dr molecules ( hu-20 , hok7 ) or hla-dqw3 molecules ( hu-18 ) , it was demonstrated that there were different distributions of these antigens in human thymus .
C0003316
epitopes
C0003320
antigens