1102
Insertion of this chimeric promoter ( ISG15 LTR ) upstream of the human IFNA2 gene directed high levels of IFN synthesis in Tat-expressing cells , while this promoter was not responsive to tumor necrosis factor alpha -mediated activation .
 ( protein: tumor necrosis factor alpha, None) , ( protein: IFN, None) , ( DNA: ISG15 LTR, None) , ( cell line: Tat-expressing cells, None) , ( DNA: chimeric promoter, None) , ( DNA: human IFNA2 gene, 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:
 ( protein: tumor necrosis factor alpha, None) , ( protein: IFN, None) , ( DNA: ISG15 LTR, None) , ( cell line: Tat-expressing cells, None) , ( DNA: chimeric promoter, None) , ( DNA: human IFNA2 gene, None) 