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Together, our results indicate that occupancy of the viral enhancer by NF-kappaB ( p50/p65 ) heterodimers is required for ongoing transcription of integrated HIV provirus in monocytes , even in cells chronically infected and permanently producing functional HIV Tat protein .
 viral enhancer, HIV Tat protein, monocytes, p50/p65, NF-kappaB ( p50/p65 ) heterodimers, NF-kappaB
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:
 viral enhancer, HIV Tat protein, monocytes, p50/p65, NF-kappaB ( p50/p65 ) heterodimers, NF-kappaB