16827
The binding epitope of 1 demonstrates a high involvement of the arabinityl linker , whereas the galactose residue is only making contact to the protein via its C - 2 site , which is very important for the discrimination between galactose and N - acetylgalactosamine , the substrate transferred by GTA .
 Chemical: arabinityl; Chemical: galactose; Chemical: galactose; Chemical: N - acetylgalactosamine
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: arabinityl; Chemical: galactose; Chemical: galactose; Chemical: N - acetylgalactosamine