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In order to elucidate the interaction mechanisms of brazzein with the sweet taste receptor , we made multiple mutations of three residues ( His31 in loop 30 - 33 , Glu36 in beta - strand III , and Glu41 in loop 40 - 43 ) .
 Chemical: His31; Chemical: Glu36; Chemical: Glu41
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: His31; Chemical: Glu36; Chemical: Glu41