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 .
 ORF 50 transactivator, EBV R protein
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 ORF 50 transactivator, EBV R protein