2025
Several mammalian responses to UV irradiation , including the activation of NF-kappa B , are believed to involve tyrosine phosphorylation .
 NF-kappa B
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