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
Which of the following does not contain b-alanine? 
Select and explain. 
A. Carnosine, B. Anserine, C. Homocarnosine, D. Pantothenic acid
C: Homocarnosine
Answer: C: Homocarnosine 
Explanation: Carnosine, Anserine, Pantothenic acid contain b- alanine in their structure Homocarnosine does not contain b alanine..