7316
Evidence is also presented, using Fe2+ /Cu2+ ions , that. OH generated from H2O2 through Fenton reactions could be a candidate oxygen reactive species to directly activate STAT3 .
 ( 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: STAT3, None) 