4720
The newly identified repressor element is a rare example of a naturally occurring perfect palindromic binding motif for the NF - kappa B / Rel family of transcription factors .
 GENE: NF - kappa B; GENE: Rel
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: NF - kappa B; GENE: Rel