5543
Recombinant I - kappa B alpha inhibited kappa B motif binding by nuclear factor - kappa B1 , RelA , and c - Rel as indicated by studies using UV radiation - induced covalent cross - linking to a bromodeoxyuridine - substituted kappa B oligonucleotide .
 Recombinant I - kappa B alpha, kappa B motif, nuclear factor - kappa B1, RelA, c - Rel, kappa B oligonucleotide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Recombinant I - kappa B alpha, kappa B motif, nuclear factor - kappa B1, RelA, c - Rel, kappa B oligonucleotide