6749
Interleukin (IL)-4 plays an important role in IgE synthesis in B cells and in Th2 differentiation in T cells .
 ( cell type: B cells, None) , ( cell line: T cells, None) , ( protein: Interleukin (IL)-4, None) , ( protein: IgE, 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:
 ( cell type: B cells, None) , ( cell line: T cells, None) , ( protein: Interleukin (IL)-4, None) , ( protein: IgE, None) 