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IL-13 caused rapid phosphorylation of the three out of four members of the known Janus family of kinases ( JAKs ).
 JAKs, IL-13, Janus family of kinases
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:
 JAKs, IL-13, Janus family of kinases