8921
When we analyzed the nature of STAT proteins capable of binding to IL-2Ralpha , pim-1 , and IRF-1 GAS elements after cytokine stimulation , we observed IFN-alpha -induced binding of STAT1 , STAT3 , and STAT4 , but not STAT5 to all of these elements.
 ( protein: STAT3, None) , ( protein: IL-2Ralpha, None) , ( protein: STAT5, None) , ( protein: STAT1, None) , ( protein: STAT4, None) , ( protein: STAT proteins, None) , ( protein: cytokine, None) , ( protein: IFN-alpha, 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: STAT3, None) , ( protein: IL-2Ralpha, None) , ( protein: STAT5, None) , ( protein: STAT1, None) , ( protein: STAT4, None) , ( protein: STAT proteins, None) , ( protein: cytokine, None) , ( protein: IFN-alpha, None) 