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Insulin - degrading enzyme ( IDE ) is a highly conserved zinc metallopeptidase that is ubiquitously distributed in human tissues , and particularly abundant in the brain , liver , and muscles .
 Chemical: zinc
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: zinc