1719
Oxidative stress enhances nuclear factor kappa B ( NF-kappa B ) activity , and NF-kappa B activity has been shown to enhance the expression of cytotoxic cytokines .
 protein: cytotoxic cytokines; protein: NF-kappa B; protein: NF-kappa B; protein: nuclear factor kappa B
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: cytotoxic cytokines; protein: NF-kappa B; protein: NF-kappa B; protein: nuclear factor kappa B