3129
The lymphoid src kinase pp56(lck) has been shown to be essential for the induction of different T lymphocyte responses , including CD4 -mediated enhancement of Ag-induced T cell activation , early T cell differentiation , induction of IL-2 production , and cytotoxicity .
 ( protein: IL-2, None) , ( cell type: T lymphocyte, None) , ( protein: lymphoid src kinase, None) , ( protein: pp56(lck), None) , ( protein: CD4, 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: IL-2, None) , ( cell type: T lymphocyte, None) , ( protein: lymphoid src kinase, None) , ( protein: pp56(lck), None) , ( protein: CD4, None) 