1508
In our studies, cells of the human monocytic line Mono Mac 6 , cultured in medium containing fetal-calf serum and low levels of lipopolysaccharide ( LPS ), also exhibit such 'constitutive' NF-kappa B , as demonstrated by mobility-shift analysis of nuclear extracts .
 ( protein: NF-kappa B, None) , ( cell line: Mono Mac 6, None) , ( cell line: human monocytic line, 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) , ( cell line: Mono Mac 6, None) , ( cell line: human monocytic line, None) 