This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'The amino acid which on decarboxylation gives rise to a product with potent vasodilator propeies is: \nSelect and explain. \nA. Arginine, B. Histidine, C. Glutamate, D. Aspaate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Histamine is derived from the decarboxylation of the aminoacid histidine, a reaction catalyzed by the enzyme L-histidine decarboxylase present in the liver. It is a hydrophilic vasoactive amine. Ref: Neuroscience in Medicine edited by P. Michael Conn, Page 496', 'role': 'assistant'}]