8027
These in vivo results are in agreement with our previously published in vitro data , which showed a greater capacity of the S581 variant in accumulation assays , and demonstrate , for the first time , an important effect of the Y581S single - nucleotide polymorphism on antibiotic secretion into cow milk .
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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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