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Therefore we investigated the modifications imposed on NF-kappa B /I kappa B components following stimulation and show that the final step of NF-kappa B induction in vivo involves phosphorylation of several members of the NF-kappa B /I kappa B protein families .
 NF-kappa B /I kappa B components, NF-kappa B, NF-kappa B, NF-kappa B, NF-kappa B /I kappa B protein families
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 /I kappa B components, NF-kappa B, NF-kappa B, NF-kappa B, NF-kappa B /I kappa B protein families