3943
In this work , we report the dissection of the mechanism underlying the function of AfsQ1 / Q2 on antibiotic production and also the identification of the AfsQ1 / Q2 regulon .
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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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