1923
The antioxidant pyrrolidine dithiocarbamate ( PDTC ) specifically inhibits activation of nuclear factor-kappa B ( NF-kappa B ).
 NF-kappa B, nuclear factor-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, nuclear factor-kappa B