10351
Upon ligand binding and cytokine receptor dimerization , Stat proteins are phosphorylated on tyrosine residues by Jak kinases .
 Jak kinases, Stat proteins, cytokine receptor
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:
 Jak kinases, Stat proteins, cytokine receptor