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Similarly, a kinase-deficient mutant of NIK ( NF-kappaB -inducing kinase ), which represents an upstream kinase in the TNF-alpha and IL-1 signaling pathways leading to IKKalpha and IKKbeta activation, blocks Tax induction of NF-kappaB .
 NF-kappaB, NIK, NF-kappaB, kinase-deficient mutant, Tax, IKKbeta, NF-kappaB -inducing kinase, IKKalpha
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-kappaB, NIK, NF-kappaB, kinase-deficient mutant, Tax, IKKbeta, NF-kappaB -inducing kinase, IKKalpha