1Z8D:
reference: The crystal structure of human muscle glycogen phosphorylase a with bound glucose and AMP: An intermediate conformation with T-state and R-state features., Lukacs CM, Oikonomakos NG, Crowther RL, Hong LN, Kammlott RU, Levin W, Li S, Liu CM, Lucas-McGady D, Pietranico S, Reik L, Proteins. 2006 Mar 7;. PMID: 16523484

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