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 dietary vitamin is required for transaminase reactions? \nSelect and explain. \nA. Thiamine, B. Folic acid, C. Pyridoxine, D. Cyanocobalamin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pyridoxal phosphate paicipates in transamination by cycling between the pyridoxal and pyridoxamine forms. Thiamine is a cofactor for transketolase and the -ketoacid dehydrogenases. Folate functions in single carbon transfer reactions. Vitamin B12 functions in methionine synthase and methylmalonyl CoA mutase.', 'role': 'assistant'}]