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Glycogen phosphorylase active site
Glycogen phosphorylase active site. Computer model of a close-up of a molecule of the enzyme glycogen phosphorylase, showing the structure of the active site with a glycogen molecule (centre). Glycogen phosphorylase catalyses the rate-limiting step in glycogenolysis (the breakdown of glycogen to glucose-1-phosphate and glycogen) in animals by releasing glucose-1-phosphate from the terminal alpha-1,4-glycosidic bond. Glycogen phosphorylase is also studied as a model protein regulated by both reversible phosphorylation and allosteric effects.
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