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 the following is a dipeptide? \nSelect and explain. \nA. carnosine, B. Glutathione, C. Glucagon, D. β-Lipoprotein', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Carnosine is a dipeptide, formed by combination of beta alanine and histidine. Carnosine is a major constituent of muscles. It can activate myosin contraction. Hydrolysis of carnosine to beta alanine and histidine is done by carnosinase. Inherited deficiency of this enzyme will lead to carnosinuria.\nReference: Vasudevan 7th\xa0 ed, pg 215', 'role': 'assistant'}]