9953
NAC inhibited the generation of Smu/Sepsilon switch fragments in normal human B cells costimulated with IL-4 and anti-CD40 monoclonal antibody .
 ( protein: anti-CD40 monoclonal antibody, None) , ( cell type: human B cells, None) , ( protein: IL-4, None) , ( protein: Smu/Sepsilon switch fragments, 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 monoclonal antibody, None) , ( cell type: human B cells, None) , ( protein: IL-4, None) , ( protein: Smu/Sepsilon switch fragments, None) 