6653
Heat pre - treated and non heat pre - treated whey protein isolate ( WPI ) were hydrolysed using alpha - chymotrypsin ( chymotrypsin ) , pepsin and trypsin .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None