8280
Intriguingly, the major E2F complex that we detected in quiescent human B-lymphocytes is consisted of pRB , E2F4 , and DP1 .
 ( protein: pRB, None) , ( protein: E2F4, None) , ( cell type: quiescent human B-lymphocytes, None) , ( protein: major E2F complex, None) , ( protein: DP1, 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: pRB, None) , ( protein: E2F4, None) , ( cell type: quiescent human B-lymphocytes, None) , ( protein: major E2F complex, None) , ( protein: DP1, None) 