4261
Competition and methylation interference assays showed that the binding site for the novel factor was limited to nucleotides in the 3 ' half of the kappa B site .
 GENE: kappa B site
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: kappa B site