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Mechanisms involved in the inhibition of growth of a human B lymphoma cell line , B104 , by anti-MHC class II antibodies .
 ( cell line: B104, None) , ( protein: anti-MHC class II antibodies, None) , ( cell line: human B lymphoma cell line, 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 line: B104, None) , ( protein: anti-MHC class II antibodies, None) , ( cell line: human B lymphoma cell line, None) 