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The activity of the promoter regulating the synthesis of the p105 precursor of the NF-kappa B p50 subunit was enhanced in these cells.
 protein: NF-kappa B p50 subunit; protein: p105 precursor; protein: p50; DNA: promoter
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 p50 subunit; protein: p105 precursor; protein: p50; DNA: promoter