Instead , the BCS stimulated transcription by counteracting 5' negative regulatory DNA sequences that block the activity of the B29 minimal promoter in its absence .
instead , the bcs stimulated transcription by counteracting 5' negative regulatory dna sequences that block the activity of the b29 minimal promoter in its absence .
O O O B-DNA_domain_or_region O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O B-protein_molecule B-DNA_domain_or_region I-DNA_domain_or_region O O O O