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The activity of DNA binding NF-kappa B dimers is tightly controlled by accessory proteins called I kappa B subunits of which there are also five different species currently known in vertebrates .
 protein: NF-kappa B; protein: accessory proteins; protein: I kappa B subunits; protein: DNA binding NF-kappa B dimers
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: NF-kappa B, accessory proteins, I kappa B subunits, DNA binding NF-kappa B dimers 
Answer:
 protein: NF-kappa B; protein: accessory proteins; protein: I kappa B subunits; protein: DNA binding NF-kappa B dimers