14483
Our results indicated that the extracellular domain of the type II IL-1R was capable of functionally interacting with interleukin-1 and transmitting the resulting signal to a heterologous cytoplasmic domain .
 interleukin-1, type II IL-1R, IL-1R, heterologous cytoplasmic domain, extracellular domain
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:
 interleukin-1, type II IL-1R, IL-1R, heterologous cytoplasmic domain, extracellular domain