1061
It is now demonstrated that HIV-1 proviral latency in the monocytic cell line U1 , in which only extremely low levels of HIV-1 expression are detected in the baseline unstimulated state, is associated with alterations in nuclear factor-kappa B ( NF-kappa B ) moieties demonstrated in these cells by electrophoretic mobility shift assays ( EMSAs ) and in situ UV cross-linking studies .
 factor-kappa B ( NF-kappa B ) moieties, NF-kappa B, monocytic cell line U1
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:
 factor-kappa B ( NF-kappa B ) moieties, NF-kappa B, monocytic cell line U1