Promoter deletion constructs demonstrated the potential role of distal promoter sequences in regulating collagenase-1 transcription .
promoter deletion constructs demonstrated the potential role of distal promoter sequences in regulating collagenase-1 transcription .
O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-protein_molecule O O