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Last, we have identified two open reading frames ( ORFs ) of HHV-6 , U86 and U89 from the immediate-early locus A, that can transactivate the CD4 promoter in HeLa cells .
 ( DNA: open reading frames, None) , ( cell line: HeLa cells, None) , ( DNA: U89, None) , ( DNA: CD4 promoter, None) , ( DNA: ORFs, None) , ( DNA: U86, 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: open reading frames, None) , ( cell line: HeLa cells, None) , ( DNA: U89, None) , ( DNA: CD4 promoter, None) , ( DNA: ORFs, None) , ( DNA: U86, None) 