Primer extension and ribonuclease protection analyses indicate a single major transcriptional start site .
primer extension and ribonuclease protection analyses indicate a single major transcriptional start site .
B-other_name I-other_name O B-protein_molecule O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O