2655
In comparison to other activators of NF-kappa B such as phorbol myristate acetate or tumor necrosis factor , we did not detect changes in the tyrosine phosphorylation status of I kappa B alpha following treatment with either of these agents.
 tumor necrosis factor, NF-kappa B, I kappa B alpha
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:
 tumor necrosis factor, NF-kappa B, I kappa B alpha