Site B ( nt 4519 to 4545 ) specifically bound four distinct nuclear protein complexes : a ubiquitous factor , a T-cell-specific factor , a B-cell-specific factor , and the monocyte/macrophage- and B-cell-specific transcription factor PU . 1/Spi-1 .
site b ( nt 4519 to 4545 ) specifically bound four distinct nuclear protein complexes : a ubiquitous factor , a t-cell-specific factor , a b-cell-specific factor , and the monocyte/macrophage- and b-cell-specific transcription factor pu . 1/spi-1 .
B-DNA_domain_or_region I-DNA_domain_or_region 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 B-protein_complex I-protein_complex I-protein_complex O O B-protein_family_or_group I-protein_family_or_group O O B-protein_family_or_group I-protein_family_or_group O O B-protein_molecule I-protein_molecule O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group B-protein_family_or_group I-protein_family_or_group B-protein_molecule I-protein_molecule I-protein_molecule O