9882
We examined the contribution of the two isoforms of STAT5 , STAT5A and STAT5B , to IL-2- and IL-7- induced activation of human peripheral blood T lymphoblasts .
 ( cell type: human peripheral blood T lymphoblasts, None) , ( protein: STAT5A, None) , ( protein: STAT5B, None) , ( protein: STAT5, 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: human peripheral blood T lymphoblasts, None) , ( protein: STAT5A, None) , ( protein: STAT5B, None) , ( protein: STAT5, None) 