963
This protein-DNA complex comigrated with the complex obtained with the purified human p65 NF-kappa B subunit and binding was inhibited by I kappa B-alpha and -beta proteins .
 protein: -beta proteins; protein: protein-DNA complex; protein: I kappa B-alpha; protein: purified human p65 NF-kappa B subunit
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: -beta proteins; protein: protein-DNA complex; protein: I kappa B-alpha; protein: purified human p65 NF-kappa B subunit