9953
NAC inhibited the generation of Smu/Sepsilon switch fragments in normal human B cells costimulated with IL-4 and anti-CD40 monoclonal antibody .
 anti-CD40 monoclonal antibody, human B cells, IL-4, Smu/Sepsilon switch fragments
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 anti-CD40 monoclonal antibody, human B cells, IL-4, Smu/Sepsilon switch fragments