15572
In the present study , the possible role of conversion of accumulated ammonia to glutamine and other free amino acids in the brain of three freshwater teleosts differing in their sensitivities to ammonia was investigated .
 ammonia, glutamine, amino acids, ammonia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ammonia, glutamine, amino acids, ammonia