1055
The induction of E2F activity preceded the appearance of cdc2 mRNA , which is consistent with the role of E2F in the regulation of cdc2 mRNA expression .
 ( protein: E2F, None) , ( RNA: cdc2 mRNA, None) , ( RNA: cdc2 mRNA, None) , ( protein: E2F, None) , ( cell type: cdc2 mRNA expression, 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, None) , ( RNA: cdc2 mRNA, None) , ( RNA: cdc2 mRNA, None) , ( protein: E2F, None) , ( cell type: cdc2 mRNA expression, None) 