5817
Transient-transfection assays showed that bcl-x promoter was transactivated by wild-type Tax .
 ( protein: Tax, None) , ( protein: wild-type Tax, None) , ( DNA: bcl-x promoter, 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: Tax, None) , ( protein: wild-type Tax, None) , ( DNA: bcl-x promoter, None) 