11579
To assess whether this inhibition was mediated via modulation of the cellular transcription factor , NF-kappa B , we carried out gel shift analysis on nuclear extracts prepared under different conditions of cell stimulation in the presence or absence of ascorbate , N-acetylcysteine ( NAC ), or zidovudine ( AZT ).
 ( protein: NF-kappa B, None) , ( protein: cellular transcription factor, 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: cellular transcription factor, None) 