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In this study multiple NF-kappa B related polypeptides ranging from 85 to 45 kDa were examined for their capacity to interact with the PRDII regulatory element of interferon beta and were shown to possess distinct intrinsic DNA binding affinities for this NF-kappa B site and form multiple DNA binding homo- and hetero dimer complexes in co-renaturation experiments.
 protein: NF-kappa B related polypeptides; protein: NF-kappa B; protein: NF-kappa B; DNA: NF-kappa B site; DNA: interferon beta; DNA: PRDII regulatory element
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:
 protein: NF-kappa B related polypeptides; protein: NF-kappa B; protein: NF-kappa B; DNA: NF-kappa B site; DNA: interferon beta; DNA: PRDII regulatory element