14823
It is also shown in this report that, in response to PMA/anti-CD28 mAb or anti-CD3/anti-CD28 mAb , c-Rel , p50 , and p65 are associated with CD28 -responsive element present in the promoter of the human interleukin 2 gene .
 ( protein: PMA/anti-CD28 mAb, None) , ( protein: CD28, None) , ( protein: c-Rel, None) , ( DNA: human interleukin 2 gene, None) , ( protein: p65, None) , ( DNA: CD28 -responsive element, None) , ( DNA: promoter, None) , ( protein: p50, None) , ( protein: anti-CD3/anti-CD28 mAb, 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: PMA/anti-CD28 mAb, None) , ( protein: CD28, None) , ( protein: c-Rel, None) , ( DNA: human interleukin 2 gene, None) , ( protein: p65, None) , ( DNA: CD28 -responsive element, None) , ( DNA: promoter, None) , ( protein: p50, None) , ( protein: anti-CD3/anti-CD28 mAb, None) 