1139
As the protein tyrosine kinase activities p56lck and p59fyn are activated in intact cells by hydrogen peroxide , they are likely targets for GSSG action .
 ( protein: p59fyn, None) , ( protein: p56lck, None) , ( protein: protein tyrosine kinase, 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: p59fyn, None) , ( protein: p56lck, None) , ( protein: protein tyrosine kinase, None) 