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Finally, in JAK-1 -deficient HeLa cells , STAT6 activation by IL-4 is completely abolished.
 IL-4, STAT6, JAK-1 -deficient HeLa cells, JAK-1
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:
 IL-4, STAT6, JAK-1 -deficient HeLa cells, JAK-1