12671
The molecular basis for this species specificity is that IFN-alpha /beta activate Stat4 in differentiating human, but not mouse, Th cells .
 ( cell type: Th cells, None) , ( protein: IFN-alpha, None) , ( protein: Stat4, None) , ( protein: IFN-alpha /beta, 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:
 ( cell type: Th cells, None) , ( protein: IFN-alpha, None) , ( protein: Stat4, None) , ( protein: IFN-alpha /beta, None) 