Using in vivo footprinting we identified two sites in the promoter at -45 and -160 that were occupied only in CD20 + B cells .
using in vivo footprinting we identified two sites in the promoter at -45 and -160 that were occupied only in cd20 + b cells .
O B-other_name I-other_name I-other_name O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-protein_molecule O O O O