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However, these studies have used a limited number of known kappa B DNA motifs , and the question of the optimal DNA sequences preferred by each homodimer has not been addressed.
 DNA: optimal DNA sequences; DNA: kappa B DNA motifs
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: optimal DNA sequences; DNA: kappa B DNA motifs