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EBV nuclear antigen 2 ( EBNA2 ), one of the first genes expressed after EBV infection of B-cells , is a transcriptional activator of viral and cellular genes and is essential for the transforming potential of the virus .
 cellular genes, B-cells, viral, viral and cellular genes, EBNA2
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:
 cellular genes, B-cells, viral, viral and cellular genes, EBNA2