13540
The association and activation of the IL-1 receptor-associated protein kinase ( IRAK ) to the IL-1 receptor complex is one of the earliest events detectable in IL-1 signal transduction .
 IL-1, IL-1 receptor complex, IL-1, IL-1 receptor-associated protein kinase, IRAK
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:
 IL-1, IL-1 receptor complex, IL-1, IL-1 receptor-associated protein kinase, IRAK