13757
Activation of nonreceptor protein tyrosine kinases ( PTKs ) is essential for T cell receptor ( TCR ) responsiveness ; however, the function of individual PTK substrates is often uncertain.
 ( protein: nonreceptor protein tyrosine kinases, None) , ( protein: PTKs, None) , ( protein: T cell receptor, None) , ( protein: tyrosine kinases, None) , ( protein: PTK substrates, None) , ( protein: TCR, 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: nonreceptor protein tyrosine kinases, None) , ( protein: PTKs, None) , ( protein: T cell receptor, None) , ( protein: tyrosine kinases, None) , ( protein: PTK substrates, None) , ( protein: TCR, None) 