7088
Analogous to costimulation via CD28 , this activity is mediated through activation of Rel/kappaB , a family of transcription factors known to regulate IL-2 and other activation-inducible proteins .
 ( protein: IL-2, None) , ( protein: transcription factors, None) , ( protein: activation-inducible proteins, None) , ( protein: Rel/kappaB, None) , ( protein: CD28, 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) , ( protein: transcription factors, None) , ( protein: activation-inducible proteins, None) , ( protein: Rel/kappaB, None) , ( protein: CD28, None) 