1869
We report here that the differential function of each of these NF-kappa B /Rel sites in several distinct cell types depends on cell-specific binding of NF-kappa B /Rel transcription factors .
 ( protein: NF-kappa B, None) , ( protein: NF-kappa B, None) , ( protein: NF-kappa B /Rel transcription factors, None) , ( DNA: NF-kappa B /Rel sites, 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: NF-kappa B, None) , ( protein: NF-kappa B /Rel transcription factors, None) , ( DNA: NF-kappa B /Rel sites, None) 