4409
To better understand the contribution of the GR N-terminal transactivation domain in mediating murine thymocyte apoptosis, we stably transfected GR , GR variants , and the androgen receptor ( AR ) into receptor-negative S49 murine thymoma cells .
 ( protein: GR N-terminal transactivation domain, None) , ( protein: AR, None) , ( protein: GR variants, None) , ( protein: GR, None) , ( cell type: murine thymoma cells, None) , ( protein: GR, None) , ( protein: GR, None) , ( cell line: receptor-negative S49 murine thymoma cells, None) , ( protein: androgen 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: GR N-terminal transactivation domain, None) , ( protein: AR, None) , ( protein: GR variants, None) , ( protein: GR, None) , ( cell type: murine thymoma cells, None) , ( protein: GR, None) , ( protein: GR, None) , ( cell line: receptor-negative S49 murine thymoma cells, None) , ( protein: androgen receptor, None) 