9558
We now show that IL-2 regulation of STAT3 proteins in T cells is a complex response involving activation of two forms of STAT3 : 90-kDa STAT3alpha and an 83-kDa carboxyl-terminal truncated STAT3beta .
 ( protein: 83-kDa carboxyl-terminal truncated STAT3beta, None) , ( protein: STAT3, None) , ( protein: STAT3 proteins, None) , ( protein: STAT3alpha, None) , ( cell type: T cells, None) , ( protein: STAT3, None) , ( protein: STAT3beta, None) , ( protein: IL-2, 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: 83-kDa carboxyl-terminal truncated STAT3beta, None) , ( protein: STAT3, None) , ( protein: STAT3 proteins, None) , ( protein: STAT3alpha, None) , ( cell type: T cells, None) , ( protein: STAT3, None) , ( protein: STAT3beta, None) , ( protein: IL-2, None) 