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 of the following are derivatives of amino acid Glycine \nSelect and explain. \nA. Heme, B. Creatinine, C. Glutathione, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Derivatives of Glycine are:\n\nHeme\nPurine ring\nGlutathione\nCreatine, creatine phosphate, creatinine\n\nNote: Glycine is not a part of pyramidine ring.', 'role': 'assistant'}]