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
All of the following amino acids are converted to succinyl-CoA, except 
Select and explain. 
A. Methionine, B. Isoleucine, C. Valine, D. Histidine
D: Histidine
Answer: D: Histidine 
Explanation: None