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': 'Which of these is a conservative mutator: \nSelect and explain. \nA. Glutamic acid- glutamine, B. Histidine-glycine, C. Alanine- leucine, D. Arginine-aspaic acid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Alanine - leucine', 'role': 'assistant'}]