This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
[{'content': 'Decarboxylation of Ammo acid produces all except \nSelect and explain. \nA. Histamine, B. Proline, C. Tryptamine, D. Tyramine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Amino decarboxylase catalyzes several different decarboxylation reactions: L-DOPA to dopamine L-phenylalanine to phenethylamine L-tyrosine to tyramine L-histidine to histamine L-tryptophan to tryptamine 5-hydroxytryptophan to serotonin (5-hydroxytryptamine) The enzyme uses pyridoxal phosphate, the active form of vitamin B6, as a cofactor. Products of Decarboxylation and its uses. Ref: Biochemistry by U. Satyanarayana 3rd edition Pgno : 375', 'role': 'assistant'}]