216
Gel shift experiments further showed that the STAT1 alpha protein bound to the Fc gamma RIC GIRE in response to IFN-gamma treatment of U937 cells .
 ( protein: STAT1 alpha protein, None) , ( DNA: Fc gamma RIC GIRE, None) , ( cell line: U937 cells, None) , ( protein: IFN-gamma, 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: STAT1 alpha protein, None) , ( DNA: Fc gamma RIC GIRE, None) , ( cell line: U937 cells, None) , ( protein: IFN-gamma, None) 