tokens: The novel complex is distinct from that described previously as binding to B cell enhancer sites and can be formed by addition of PU . 1 to extracts from certain nonmyeloid cell types which do not express PU . 1 , including T cells and epithelial cells , but not from erythroid cells .
folded_tokens: the novel complex is distinct from that described previously as binding to b cell enhancer sites and can be formed by addition of pu . 1 to extracts from certain nonmyeloid cell types which do not express pu . 1 , including t cells and epithelial cells , but not from erythroid cells .
labels: O O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O O O O B-cell_type I-cell_type I-cell_type O O O O B-protein_molecule I-protein_molecule I-protein_molecule O O B-cell_type I-cell_type O B-cell_type I-cell_type O O O O B-cell_type I-cell_type O