This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Amino Acids Basics, Subject name: Biochemistry
[{'content': 'Gamma amino butyrate is synthesized from? - \nSelect and explain. \nA. Fumarate, B. Glutamate, C. Histidine, D. Glycine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Glutamate \\Ref: Harper 29th/ e p. 304-305]o Gamma amino butyric acid (GABA) is formed by decarboxylation of L-glutamate.Amino acidsBiological important compoundTyrosineCatecholamines (epinephrineQ, norepinephrineQ, dopamineQ), thyroxineQ, triiodothryonine, melanin Q.(Note: - Phenylalanine is the precursor of tyrosine, thus it can also give rise to all these compounds through tyrosine (phenylalanine - TyrosineQ - CatecholaminesQ, thyroxineQ, T3, melaninQ).TryptophanVitamin niacinQ, melatoninQ, SerotoninQGlycineQ,ArginineQ,methionineQCreatineQGlycine, cysteineBile saltsGlycineHeme.Aspartic acid andglutaminePyrimidine basesGlycineQ, aspartic acid, glutaminePurine basesQb-alanineCoenzyme-AArginineNitric oxideQGlutamateGama-amino butyric acid (GABA)", 'role': 'assistant'}]