14482
However, a hybrid receptor composed of the extracellular and transmembrane regions of the human type II interleukin-1 fused to the cytoplasmic domain of the human type I IL-1R was capable of transducing a signal across the membrane resulting in a pattern of gene activation identical to that mediated by the type I IL-1R .
 human type I IL-1R, IL-1R, IL-1R, human type II interleukin-1, type I IL-1R, cytoplasmic 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:
 human type I IL-1R, IL-1R, IL-1R, human type II interleukin-1, type I IL-1R, cytoplasmic domain