12884
We further demonstrated that IL -2 , -7 , and -15 induce multiple STAT proteins , including STAT5a , STAT5b , STAT1 alpha , STAT3 , and another unidentified Fc gamma RI GAS DNA-binding protein .
 ( protein: Fc gamma RI GAS DNA-binding protein, None) , ( protein: STAT3, None) , ( protein: multiple STAT proteins, None) , ( protein: STAT5a, None) , ( protein: STAT1 alpha, None) , ( protein: STAT5b, 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: Fc gamma RI GAS DNA-binding protein, None) , ( protein: STAT3, None) , ( protein: multiple STAT proteins, None) , ( protein: STAT5a, None) , ( protein: STAT1 alpha, None) , ( protein: STAT5b, None) 