4204
Lactoperoxidase was purified 409 - fold from the synthesized affinity matrix in a single step , with a yield of 62 . 3 % and a specific activity of 40 . 9 EU / mg protein .
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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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