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The KBF1 factor , which binds to the enhancer A located in the promoter of the mouse MHC class I gene H-2Kb , is indistinguishable from the p50 DNA binding subunit of the transcription factor NF-kappa B , which regulates a series of genes involved in immune and inflammatory responses .
 protein: transcription factor NF-kappa B; protein: NF-kappa B; DNA: enhancer A; DNA: H-2Kb; protein: p50 DNA binding subunit; DNA: mouse MHC class I gene; DNA: promoter; protein: KBF1 factor
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: transcription factor NF-kappa B; protein: NF-kappa B; DNA: enhancer A; DNA: H-2Kb; protein: p50 DNA binding subunit; DNA: mouse MHC class I gene; DNA: promoter; protein: KBF1 factor