1272
This function was a result of the interaction of EBV with its receptor, CD21 , but was caused by infection rather than surface signaling, because neither specific mAb nor the P3HR-1 strain of virus mimicked the effect of B95-8.
 ( protein: CD21, None) , ( protein: specific 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: CD21, None) , ( protein: specific mAb, None) 