3636
E3 , one of nine sequences identified, was upregulated in an immediate-early manner , with transcript levels peaking after 60 minutes exposure to RA .
 ( protein: E3, 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: E3, None) 