12880
We demonstrate that IL-12 induces STAT4 only in freshly isolated primary NK cells , but not in primary T cells , consistent with the lack of the IL-12 receptor in resting T cells .
 ( protein: IL-12, None) , ( protein: IL-12, None) , ( cell type: resting T cells, None) , ( protein: IL-12 receptor, None) , ( cell type: primary NK cells, None) , ( cell type: primary T cells, None) , ( cell type: NK cells, None) , ( protein: STAT4, 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: IL-12, None) , ( protein: IL-12, None) , ( cell type: resting T cells, None) , ( protein: IL-12 receptor, None) , ( cell type: primary NK cells, None) , ( cell type: primary T cells, None) , ( cell type: NK cells, None) , ( protein: STAT4, None) 