1883
This is followed by a conformational change and a nucleophilic attack of Cys - 35 to give the 14 - membered disulfide ring in thioredoxin - S2 and the dithiol of the substrate .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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