2PYY:
reference: Crystal Structure of the GluR0 Ligand-Binding Core from Nostoc punctiforme in Complex with l-Glutamate: Structural Dissection of the Ligand Interaction and Subunit Interface., Lee JH, Kang GB, Lim HH, Jin KS, Kim SH, Ree M, Park CS, Kim SJ, Eom SH, J Mol Biol. 2007 Nov 6;. PMID: 18164033

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