Footprinting analysis revealed that the identical sequence CCGAAACTGAAAAGG , designated E6 , was protected by nuclear extracts from B cells , T cells , or HeLa cells .
footprinting analysis revealed that the identical sequence ccgaaactgaaaagg , designated e6 , was protected by nuclear extracts from b cells , t cells , or hela cells .
B-other_name I-other_name O O O O O B-polynucleotide O O B-DNA_domain_or_region O O O O B-cell_component I-cell_component O B-cell_type I-cell_type O B-cell_type I-cell_type O O O O O