This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glycogen, Subject name: Biochemistry
[{'content': 'Glycogenin is a protein with self-glucosylation capacity. To which amino acid of glycogenin, glucose molecules are attached? \nSelect and explain. \nA. Serine, B. Threonine, C. Tyrosine, D. Hydroxylysine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Glycogenin protein primer for glycogen synthesis. has self-glucosylation capacity. Glucose residues are added to the OH group of tyrosine residues of glycogenin through O-glycosidic bond. catalyse the addition of up to 8 glucose residues aalpha (1-4) glucosidic bond.', 'role': 'assistant'}]