In summary , platelet-activating factor is shown here to have a direct and profound effect on a pure B cell line .
in summary , platelet-activating factor is shown here to have a direct and profound effect on a pure b cell line .
O O O B-protein_molecule I-protein_molecule O O O O O O O O O O O O B-cell_line I-cell_line I-cell_line I-cell_line O