Fibronectin synergized with anti-CD3 antibody to promote CD4 cell proliferation in a serum-free culture system whereas no proliferation was observed when CD4 cells were cultured with anti-CD3 alone or fibronectin alone .
fibronectin synergized with anti-cd3 antibody to promote cd4 cell proliferation in a serum-free culture system whereas no proliferation was observed when cd4 cells were cultured with anti-cd3 alone or fibronectin alone .
B-protein_family_or_group O O B-protein_molecule I-protein_molecule O O B-protein_molecule O O O O B-other_name I-other_name I-other_name O O B-other_name O O O B-cell_line I-cell_line O O O B-protein_molecule O O B-protein_family_or_group O O