17126
Three ( hefABC efflux system , Hydrogenase expression protein / formation of HypD , Cag pathogenecity island protein X ) of the 17 predicted drug targets are already experimentally validated either genetically or biochemically lending credence to our unique approach .
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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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