Moreover , BSAP is clearly a B-cell-specific transcription factor , as a wild-type but not a mutant TSAP -binding site of the sea urchin functions only in transfected B cells as an upstream promoter element .
moreover , bsap is clearly a b-cell-specific transcription factor , as a wild-type but not a mutant tsap -binding site of the sea urchin functions only in transfected b cells as an upstream promoter element .
O O B-protein_molecule O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O B-DNA_domain_or_region O O O B-DNA_domain_or_region B-protein_molecule O O O O B-multi_cell I-multi_cell O O O B-cell_line I-cell_line I-cell_line O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O