21652
In water at 45 degrees C , the block polypeptides initially assemble into nanoparticles rich in beta - turn structures , which further connect into long ( > 10 mu m ) , beaded nanofibers along with the increase in the beta - sheet content .
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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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