10105
This was due to the presence of the more voluminous Gln - 303 side chain ( Ser - 302 in AR ) and of a water molecule buried in a subpocket located at the base of flexible loop A .
 Chemical: Gln; Chemical: Ser
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: Gln; Chemical: Ser