22780
We found 85 downregulated proteins , and Ingenuity Pathways Analysis ( IPA ) revealed a protein - protein network with chromodomain - helicase - DNA - binding protein 4 ( Chd4 ) in the center .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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