4546
This nonresponsiveness occurs because of a lack of expression of the beta- chain (accessory factor) of the IFN-gamma receptor , while at the same time maintaining IFN-gamma receptor alpha-chain expression .
 ( protein: IFN-gamma receptor, None) , ( protein: beta- chain, None) , ( protein: IFN-gamma receptor alpha-chain, None) , ( protein: IFN-gamma receptor, 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: IFN-gamma receptor, None) , ( protein: beta- chain, None) , ( protein: IFN-gamma receptor alpha-chain, None) , ( protein: IFN-gamma receptor, None) 