The A site in the 21 bp repeat has strong homology with previously described binding sites for the transcription factor AP-2 .
the a site in the 21 bp repeat has strong homology with previously described binding sites for the transcription factor ap-2 .
O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-other_name O O O