A cell type-specific enhancer in the human B7 . 1 gene regulated by NF-kappaB .
a cell type-specific enhancer in the human b7 . 1 gene regulated by nf-kappab .
O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-protein_complex O