13043
CD30 is a CD40 -inducible molecule that negatively regulates CD40 -mediated immunoglobulin class switching in non-antigen-selected human B cells .
 ( protein: CD40, None) , ( protein: CD40 -mediated immunoglobulin, None) , ( cell line: non-antigen-selected human B cells, None) , ( protein: CD40 -inducible molecule, None) , ( protein: CD30, None) , ( protein: CD40, 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: CD40, None) , ( protein: CD40 -mediated immunoglobulin, None) , ( cell line: non-antigen-selected human B cells, None) , ( protein: CD40 -inducible molecule, None) , ( protein: CD30, None) , ( protein: CD40, None) 