2288
Such observations indicate that IL-4 Stat has the same functional domain for both receptor coupling and dimerization .
 functional domain, IL-4 Stat
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:
 functional domain, IL-4 Stat