12759
CD27+ B cells had the ability to produce IgE , which was increased by contact with CD70 transfectants , whereas CD27- B cells did not produce IgE .
 ( cell type: CD27+ B cells, None) , ( protein: IgE, 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: CD27+ B cells, None) , ( protein: IgE, None) , ( protein: IgE, None) 