tokens: Using deletion mutants and specific CD4 promoter mutants , we identified an ATF/CRE binding site located at nucleotides -67 to -60 upstream of the CD4 gene transcription start site that is important for HHV-6 transactivation .
folded_tokens: using deletion mutants and specific cd4 promoter mutants , we identified an atf/cre binding site located at nucleotides -67 to -60 upstream of the cd4 gene transcription start site that is important for hhv-6 transactivation .
labels: O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-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 I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O B-virus O O