5318
As early as 2 h after addition of the inhibitor to the culture medium , there was an inhibition of both constitutive activation of NF-kappaB and HIV-1 genome expression .
 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:
 NF-kappaB