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In this work , glutamate decarboxylase ( EC 4 . 1 . 1 . 15 , GAD ) which is key in the GABA bioformation was purified from 5 - day germinated faba beans and characterized .
 Chemical: glutamate; Chemical: GABA
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: GABA