igm molecules were purified by the use of anti-igm antibody-coupled sepharose from the culture supernatant of an epstein-barr-virus-transformed lymphoblastoid cell line , mp1 , that secretes alloantibodies possessing hla-dqw2 specificity as defined by the cytotoxicity assay .
C0003241
antibody
C0022144
alloantibodies