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
Carnosine is a major constituent of 
Select and explain. 
A. Kidney, B. Muscle, C. Brain, D. Adipose tissue
B: Muscle
Answer: B: Muscle 
Explanation: Carnosine (α-alanyl-histidine) is a dipeptide that is present in large quantities in muscle tissue.