7822
CD40 expression was confirmed in 7 human MM cell lines established from immunogenic primary tumors or metastases , whereas 11 cell lines established from advanced stages were CD40 negative .
 ( protein: CD40, None) , ( cell line: human MM cell lines, None) , ( protein: CD40, None) , ( cell line: cell lines, 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) , ( cell line: human MM cell lines, None) , ( protein: CD40, None) , ( cell line: cell lines, None) 