1224
Taken together, we report that IL-2 induces tyrosine phosphorylation and subsequent nuclear translocation of stat3 and an as yet undefined 84-kDa protein in antigen-specific human T cell lines .
 ( protein: 84-kDa protein, None) , ( protein: IL-2, None) , ( cell line: antigen-specific human T cell lines, None) , ( protein: stat3, 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: 84-kDa protein, None) , ( protein: IL-2, None) , ( cell line: antigen-specific human T cell lines, None) , ( protein: stat3, None) 