This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
[{'content': 'PLP is not required for: \nSelect and explain. \nA. Cystathionine b synthase, B. Glutamate decarboxylase, C. Aspaate transaminase, D. Glucose 6 phosphate dehydrogenase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vitamin B6 is involved in a variety of reactions as shown below: Carbohydrate metabolism: Glycogen Phosphorylase Amino Acid Metabolism: All Transaminases - ALT, AST Cystathionine b synthase ,Cystathioninase,decarboxylases, Kynureninase, Heme synthesis, ALA synthase Lipid metabolism:- Synthesis of arachidonic acid, Synthesis of Sphingosine (Serine palmitoyltransferase & sphingosine-1-phosphate lyase) Steroid Hormone action: Removes hormone receptor complex from DNA & terminates the action of hormone. Glucose 6 phosphate dehydrogenase requires NADP or vitamin B3 (Niacin) as a coenzyme.', 'role': 'assistant'}]