801
Glycine release is regulated by metabotropic glutamate receptors sensitive to mGluR2 / 3 ligands and activated by N - acetylaspartylglutamate ( NAAG ) .
 Chemical: Glycine; Chemical: glutamate; Chemical: N - acetylaspartylglutamate; Chemical: NAAG
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: Glycine; Chemical: glutamate; Chemical: N - acetylaspartylglutamate; Chemical: NAAG