15235
In this study , we have used Ala residues as probes for structural and dynamic changes of alpha TS throughout its catalytic cycle , in the absence of the beta - subunit .
 Chemical: Ala
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: Ala