12020
Reactivation of Kaposi's sarcoma -associated herpesvirus infection from latency by expression of the ORF 50 transactivator , a homolog of the EBV R protein .
 ( protein: ORF 50 transactivator, None) , ( protein: EBV R protein, 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: ORF 50 transactivator, None) , ( protein: EBV R protein, None) 