5509
The site - directed mutation of the kappa B motif in IL - 6 / CAT plasmid resulted in the complete abrogation of IL - 6 promoter activity in these cells .
 kappa B motif, IL - 6, CAT, IL - 6 promoter
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 kappa B motif, IL - 6, CAT, IL - 6 promoter