14935
The Epstein-Barr virus protein EBNA2 acts as a transcriptional activator of cellular and viral genes and plays a crucial role in the immortalization of human primary B-cells by EBV .
 ( protein: transcriptional activator, None) , ( cell type: human primary B-cells, None) , ( protein: Epstein-Barr virus 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: transcriptional activator, None) , ( cell type: human primary B-cells, None) , ( protein: Epstein-Barr virus protein EBNA2, None) 