12926
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 .
 ( DNA: CD4 gene, None) , ( DNA: CD4 promoter mutants, None) , ( DNA: ATF/CRE binding site, None) , ( DNA: CD4 promoter, None) , ( DNA: CD4 gene transcription start site, None) , ( DNA: nucleotides -67 to -60 upstream, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: CD4 gene, None) , ( DNA: CD4 promoter mutants, None) , ( DNA: ATF/CRE binding site, None) , ( DNA: CD4 promoter, None) , ( DNA: CD4 gene transcription start site, None) , ( DNA: nucleotides -67 to -60 upstream, None) 