952
To determine whether EBNA-2 also trans-activates the LMP promoter by protein-protein interactions , we performed a series of gel retardation assays and competition experiments with LMP promoter fragments of different sizes.
 ( DNA: LMP promoter, None) , ( DNA: LMP promoter fragments, None) , ( DNA: LMP promoter, None) , ( protein: EBNA-2, 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: LMP promoter, None) , ( DNA: LMP promoter fragments, None) , ( DNA: LMP promoter, None) , ( protein: EBNA-2, None) 