14344
Together, these results suggest that NF-kappa B plays an important role in long-term activation of human primary T-lymphocytes via CD2 + CD28 .
 ( protein: CD28, None) , ( cell type: T-lymphocytes, None) , ( protein: CD2, None) , ( cell type: human primary T-lymphocytes, None) , ( protein: NF-kappa B, 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: CD28, None) , ( cell type: T-lymphocytes, None) , ( protein: CD2, None) , ( cell type: human primary T-lymphocytes, None) , ( protein: NF-kappa B, None) 