This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Classification and metabolism of amino acids, Subject name: Biochemistry
[{'content': 'The biosynthesis of Epinephrine from Norepinephrine requires \nSelect and explain. \nA. Pyridoxal phosphate, B. Biotin, C. Cytochrome P450, D. S-adenosyl methionine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: S-adenosyl methionine (SAM) is the methyl donor for the conversion of Norepinephrine to Epinephrine.', 'role': 'assistant'}]