3680
These results suggest that, while lipopolysaccharide -induced expression of inflammatory mediators requires tyrosine kinase activity , tyrosine kinase activity is not obligatory for lipopolysaccharide signal transduction .
 tyrosine kinase, tyrosine kinase, inflammatory mediators
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:
 tyrosine kinase, tyrosine kinase, inflammatory mediators