4651
A gel retardation experiment with synthetic double-stranded oligonucleotides showed that activated NF-kappa B consisting of p50/p65 heterodimer bound to all four putative NF-kappa B DNA probes , suggesting that all four putative NF-kappa B recognition sites play an important role in inducible TNF-alpha expression .
 ( protein: TNF-alpha, None) , ( protein: NF-kappa B, None) , ( DNA: NF-kappa B recognition sites, None) , ( protein: p50/p65 heterodimer, None) , ( protein: NF-kappa B, None) , ( DNA: NF-kappa B DNA probes, None) , ( protein: NF-kappa B, 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: TNF-alpha, None) , ( protein: NF-kappa B, None) , ( DNA: NF-kappa B recognition sites, None) , ( protein: p50/p65 heterodimer, None) , ( protein: NF-kappa B, None) , ( DNA: NF-kappa B DNA probes, None) , ( protein: NF-kappa B, None) 