3123
We demonstrated that the virus dUTPase isolated from EBV -infected cells is a phosphoprotein .
 ( protein: phosphoprotein, None) , ( cell type: EBV -infected cells, None) , ( protein: virus dUTPase, 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: phosphoprotein, None) , ( cell type: EBV -infected cells, None) , ( protein: virus dUTPase, None) 