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The elimination of damaged mitochondria in mammals is mediated by a pathway comprised of PTEN - induced putative protein kinase 1 ( PINK1 ) and the E3 ubiquitin ligase Parkin .
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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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