The proximal element is a composite site that binds members of the CREB/ATF , AP-1 , and octamer families of transcription factors .
the proximal element is a composite site that binds members of the creb/atf , ap-1 , and octamer families of transcription factors .
O O O O O O O O O O O O B-protein_family_or_group O B-protein_family_or_group O O B-protein_family_or_group I-protein_family_or_group O B-protein_family_or_group I-protein_family_or_group O