5248
EBNA-5 is one of the Epstein-Barr virus ( EBV )-encoded nuclear proteins required for immortalization of human B lymphocytes .
 ( cell type: human B lymphocytes, None) , ( protein: EBNA-5, None) , ( protein: Epstein-Barr virus ( EBV )-encoded nuclear proteins, 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:
 ( cell type: human B lymphocytes, None) , ( protein: EBNA-5, None) , ( protein: Epstein-Barr virus ( EBV )-encoded nuclear proteins, None) 