1581
We generated conditional EBV mutants by expressing EBNA2 as chimeric fusion protein with the hormone binding domain of the estrogen receptor on the genetic background of the virus.
 ( protein: chimeric fusion protein, None) , ( protein: estrogen receptor, None) , ( protein: EBNA2, 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: chimeric fusion protein, None) , ( protein: estrogen receptor, None) , ( protein: EBNA2, None) 