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Here , we report that their mammalian homolog , Dom3Z ( referred to as DXO ) , possesses pyrophosphohydrolase , decapping , and 5 ' - to - 3 ' exoribonuclease activities .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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