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 .
 ( protein: NF-kappa B, None) , ( protein: chloramphenicol acetyltransferase, None) , ( DNA: NF-kappa B sites, None) , ( cell line: U937 cells, None) , ( protein: CAT, None) , ( DNA: HIV-1 enhancer, None) , ( DNA: chloramphenicol acetyltransferase ( CAT ) reporter, 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: NF-kappa B, None) , ( protein: chloramphenicol acetyltransferase, None) , ( DNA: NF-kappa B sites, None) , ( cell line: U937 cells, None) , ( protein: CAT, None) , ( DNA: HIV-1 enhancer, None) , ( DNA: chloramphenicol acetyltransferase ( CAT ) reporter, None) 