4307
These results suggest a critical role of c-jun in both cell proliferation and PMA -induced cell adhesion but not in PMA -induced respiratory burst in U937 cells .
 ( DNA: c-jun, None) , ( cell line: U937 cells, 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:
 ( DNA: c-jun, None) , ( cell line: U937 cells, None) 