15236
Projection analysis of the chemical shift changes by site - specific amino acid substitutions and ligand titrations indicates that alpha TS has three important conformational states : ligand - free , glyceraldehyde - 3 - phosphate - bound ( like ) , and the active states .
 Chemical: amino acid; Chemical: glyceraldehyde - 3 - phosphate
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: amino acid; Chemical: glyceraldehyde - 3 - phosphate