You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The first product of glycogenolysis is: and explain in detail?
Glycogenolysis, the breakdown of glycogen to release glucose, is an impoant pathway in energy use and reactions that utilize carbohydrates. Glycogenolysis involves three steps. First, the repetitive removal of glucose residues by phosphorylase breaking bonds between carbons 1 and 4, producing a glucose-1-phosphate molecule. However, this process stops when four glucose residues are left before the carbons 1 and 6 branch points. Second, a glucan transferase enzyme moves three residues to the linear pa of the glycogen chain, leaving only the final branched glucose residue. Third, a debranching enzyme cleaves the carbons 1 and 6 bond. A final enzyme conves the resulting glucose-1-phosphate molecules into glucose-6-phosphate for entry into glycolysis. Ref: Janson L.W., Tischler M.E. (2012). Chapter 6. Carbohydrate Metabolism. In L.W. Janson, M.E. Tischler (Eds), The Big Picture: Medical Biochemistry.