Cells from TNFRp55-/-mutant mice lack expression of TNFRp55 but display normal numbers of high affinity TNFRp75 molecules .
cells from tnfrp55-/-mutant mice lack expression of tnfrp55 but display normal numbers of high affinity tnfrp75 molecules .
O O B-other_artificial_source I-other_artificial_source O O O B-protein_molecule O O O O O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O