11765
In this manuscript we have investigated the molecular mechanisms by which T cell lines stimulated with phorbol 12-myristate 13-acetate ( PMA ) and phytohemagglutin ( PHA ) display significantly higher levels of NF-kappa B1 encoding transcripts than cells stimulated with tumor necrosis factor-alpha , despite the fact that both stimuli activate NF-kappa B .
 PHA, tumor necrosis factor-alpha, NF-kappa B, NF-kappa B1, T cell lines, transcripts, phytohemagglutin
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:
 PHA, tumor necrosis factor-alpha, NF-kappa B, NF-kappa B1, T cell lines, transcripts, phytohemagglutin