8226
On the other hand, the growth factor does induce the activation of STAT3 and STAT5 in these cells, as has been previously demonstrated .
 ( protein: STAT3, None) , ( protein: growth factor, 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:
 ( protein: STAT3, None) , ( protein: growth factor, None) , ( protein: STAT5, None) 