Like other enhancers , the Ig heavy chain enhancer contains several short sequence motifs that bind specific transcription factors .
like other enhancers , the ig heavy chain enhancer contains several short sequence motifs that bind specific transcription factors .
O O B-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O B-DNA_family_or_group I-DNA_family_or_group O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O