In extracts of induced , Il-2 secreting El4 cells three individual protein factors bind to TCEd DNA .
in extracts of induced , il-2 secreting el4 cells three individual protein factors bind to tced dna .
O O O O O B-protein_molecule O O O O O B-protein_family_or_group I-protein_family_or_group O O B-DNA_domain_or_region I-DNA_domain_or_region O