8381
Several intracellular signaling proteins , such as CBL and VAV , were phosphorylated on tyrosine in response to CD80 , CD86 , and anti-CD28 mAb .
 ( protein: CD80, None) , ( protein: CBL, None) , ( protein: VAV, None) , ( protein: signaling proteins, None) , ( protein: anti-CD28 mAb, None) , ( protein: CD86, 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: CBL, None) , ( protein: VAV, None) , ( protein: signaling proteins, None) , ( protein: anti-CD28 mAb, None) , ( protein: CD86, None) 