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 .
 ( protein: factor-kappa B ( NF-kappa B ) moieties, None) , ( protein: NF-kappa B, None) , ( cell line: monocytic cell line U1, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: factor-kappa B ( NF-kappa B ) moieties, None) , ( protein: NF-kappa B, None) , ( cell line: monocytic cell line U1, None) 