In gel-shift assays , the -1280 element and the c-fos SRE cross -competed , whereas their functional and binding mutants did not .
in gel-shift assays , the -1280 element and the c-fos sre cross -competed , whereas their functional and binding mutants did not .
O B-other_name I-other_name O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_molecule I-DNA_molecule I-DNA_molecule O O O O O O B-DNA_molecule I-DNA_molecule O O O