Deletions upstream of the PRDII element increased transcription in the uninduced extract , indicating predominantly negative regulation of the promoter .
deletions upstream of the prdii element increased transcription in the uninduced extract , indicating predominantly negative regulation of the promoter .
O O O O B-DNA_domain_or_region I-DNA_domain_or_region O B-other_name O O O O O O O B-other_name I-other_name O O B-DNA_domain_or_region O