4442
Differential phosphorylation and consequent differential activation of both separate and overlapping STAT proteins by IL-2 , IL-12 , and IFN-alpha may provide a molecular basis for the similarities and differences in the actions of these cytokines on NK cells .
 ( protein: IFN-alpha, None) , ( cell type: NK cells, None) , ( protein: IL-2, None) , ( protein: cytokines, None) , ( protein: STAT proteins, None) , ( protein: IL-12, 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-alpha, None) , ( cell type: NK cells, None) , ( protein: IL-2, None) , ( protein: cytokines, None) , ( protein: STAT proteins, None) , ( protein: IL-12, None) 