3402
Second, we studied the effect of NAC on IgE synthesis in human normal B cells costimulated with IL-4 and anti-CD40 mAb .
 ( protein: anti-CD40 mAb, None) , ( protein: IgE, None) , ( protein: IL-4, 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: anti-CD40 mAb, None) , ( protein: IgE, None) , ( protein: IL-4, None) 