6451
Moreover, we demonstrate that this inhibitor prevented tetanus toxoid antigen-specific T cell proliferation and expansion but failed to block activation of Zap70 or p56Lck after anti-CD3 stimulation of human T cells .
 ( protein: p56Lck, None) , ( protein: Zap70, None) , ( cell type: T cells, None) , ( protein: anti-CD3, 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: p56Lck, None) , ( protein: Zap70, None) , ( cell type: T cells, None) , ( protein: anti-CD3, None) 