6662
This study showed that by manipulating protein conformation with pre - hydrolysis heat treatment , combined with careful enzyme selection , peptides with dual functionalities can be produced from WPI for use as functional ingredients in the manufacture of functional foods .
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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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