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These data demonstrate that Stat3 but not Stat1 or Stat5 is directly recruited to the ligand-activated IL-10 receptor by binding to specific but redundant receptor intracellular domain sequences containing phosphotyrosine .
 intracellular domain, Stat3, ligand-activated IL-10 receptor, Stat1, Stat5, receptor intracellular domain sequences
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:
 intracellular domain, Stat3, ligand-activated IL-10 receptor, Stat1, Stat5, receptor intracellular domain sequences