5682
These data indicate that E2F-1 can prevent terminal differentiation , probably through its cell cycle -stimulatory activity .
 ( protein: E2F-1, 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: E2F-1, None) 