tokens: A variety of other cells , including transformed erythroid precursors , do not have IBR but a factor referred to as IBF ( 68 to 70 kDa ) that recognizes the same IBR sites .
folded_tokens: a variety of other cells , including transformed erythroid precursors , do not have ibr but a factor referred to as ibf ( 68 to 70 kda ) that recognizes the same ibr sites .
labels: O O O O O O O B-cell_type I-cell_type I-cell_type O O O O B-protein_molecule O O O O O O B-protein_molecule O O O O O O O O O O B-protein_molecule O O