Gel electrophoresis mobility shift assays and DNaseI footprinting assays demonstrate that these negative regulatory sequences are recognized differently by proteins present in nuclear extracts obtained from HeLa and K562 cells .
gel electrophoresis mobility shift assays and dnasei footprinting assays demonstrate that these negative regulatory sequences are recognized differently by proteins present in nuclear extracts obtained from hela and k562 cells .
B-other_name I-other_name I-other_name I-other_name I-other_name O B-protein_molecule O O O O O O O O O O O O B-protein_N/A O O B-cell_component I-cell_component O O B-cell_line O B-cell_line I-cell_line O