16826
Enzymatic characterization showed 1 to be extremely specific , as the highly homologous human N - acetylgalactosaminyltransferase ( GTA ) is not inhibited .
 Chemical: N
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: N