Proliferation of T cells was induced by immobilized anti-CD3 monoclonal antibody ( mAb ) in the presence or absence of an additional costimulatory signal delivered by anti-CD28 mAb .
proliferation of t cells was induced by immobilized anti-cd3 monoclonal antibody ( mab ) in the presence or absence of an additional costimulatory signal delivered by anti-cd28 mab .
O O B-cell_type I-cell_type O O O O B-protein_molecule I-protein_molecule I-protein_molecule O B-protein_family_or_group O O O O O O O O O O O O O B-protein_molecule I-protein_molecule O