9880
IL-2 and IL-7 induce heterodimerization of STAT5 isoforms in human peripheral blood T lymphoblasts .
 ( protein: STAT5 isoforms, None) , ( protein: IL-2, None) , ( protein: IL-7, None) , ( cell type: human peripheral blood T lymphoblasts, 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: STAT5 isoforms, None) , ( protein: IL-2, None) , ( protein: IL-7, None) , ( cell type: human peripheral blood T lymphoblasts, None) 