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The class II proteins are expressed constitutively on B-cells and EBV-transformed B-cells , and are inducible by IFN-gamma on a wide variety of cell types .
 ( cell type: B-cells, None) , ( cell type: B-cells, None) , ( cell type: cell types, None) , ( protein: IFN-gamma, None) , ( protein: class II proteins, None) , ( cell line: EBV-transformed B-cells ,, 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: B-cells, None) , ( cell type: B-cells, None) , ( cell type: cell types, None) , ( protein: IFN-gamma, None) , ( protein: class II proteins, None) , ( cell line: EBV-transformed B-cells ,, None) 