14024
To determine the effects on transcriptional regulation , U937 cells were transfected with a plasmid containing the HIV-1 enhancer (bearing two NF-kappa B sites ) coupled to a chloramphenicol acetyltransferase ( CAT ) reporter .
 NF-kappa B, chloramphenicol acetyltransferase, NF-kappa B sites, U937 cells, CAT, HIV-1 enhancer, chloramphenicol acetyltransferase ( CAT ) reporter
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-kappa B, chloramphenicol acetyltransferase, NF-kappa B sites, U937 cells, CAT, HIV-1 enhancer, chloramphenicol acetyltransferase ( CAT ) reporter