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': 'Histidine to histamine is ? \nSelect and explain. \nA. Carboxylation, B. Decarboxylation, C. Oxidation, D. Reduction', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., DecarboxylationHistamine is synthesized from histidine by decarboxylation catalyzed by histidine decarboxylase.Reaction requires pyridoxal phosphate (PLP) as coenzyme.", 'role': 'assistant'}]