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Nuclear transcription factor kB ( NF-kappa B ) is a ubiquitous transcription factor and pleiotropic regulator of numerous genes involved in the immune and inflammatory responses .
 NF-kappa B, ubiquitous transcription factor, Nuclear transcription factor kB, pleiotropic regulator
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 NF-kappa B, ubiquitous transcription factor, Nuclear transcription factor kB, pleiotropic regulator