13288
p21ras is activated by the T cell antigen receptor ( TCR ) and then co-ordinates important signaling pathways for T lymphocyte activation .
 ( protein: TCR, None) , ( protein: T cell antigen receptor, None) , ( protein: T lymphocyte, None) , ( protein: p21ras, 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: TCR, None) , ( protein: T cell antigen receptor, None) , ( protein: T lymphocyte, None) , ( protein: p21ras, None) 