8376
Ligation of either CD80 ( B7-1 ) or CD86 ( B7-2 ), two principal ligands for CD28 , is thought to skew the immune response toward Th1 or Th2 differentiation .
 ( protein: CD80, None) , ( protein: CD86, None) , ( protein: B7-2, None) , ( protein: B7-1, 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: CD80, None) , ( protein: CD86, None) , ( protein: B7-2, None) , ( protein: B7-1, None) , ( protein: CD28, None) 