This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'Phenylalanine metabolism products are all except \nSelect and explain. \nA. Epinephrine, B. Dopamine, C. Melanin, D. Melatonin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Phenylalanine is conveed into Tyrosine by the action of enzyme Phenylalanine hydroxylase. Tyrosine is conveed into Melanin, Catecholamines, Dopamine, and Thyroxine through various metabolic pathways.Ref: DM Vasudevan - Textbook of Biochemistry, 6th edition, page no: 233', 'role': 'assistant'}]