This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
Which aminoacid does not take pa in one carbon transfer reactions? 
Select and explain. 
A. Alanine, B. Histidine, C. Glycine, D. Serine
A: Alanine
Answer: A: Alanine 
Explanation: Reference: Harpers illustrated biochemistry 30th edition