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Glutamate transporters play an important role to maintain the homeostasis of glutamate concentration in the brain tissue .
 Chemical: Glutamate; Chemical: glutamate
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: Glutamate; Chemical: glutamate