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Last, we have identified two open reading frames ( ORFs ) of HHV-6 , U86 and U89 from the immediate-early locus A, that can transactivate the CD4 promoter in HeLa cells .
 open reading frames, HeLa cells, U89, CD4 promoter, ORFs, U86
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:
 open reading frames, HeLa cells, U89, CD4 promoter, ORFs, U86