2PGY:
reference: The effect of heavy atoms on the conformation of the active-site polypeptide loop in human ABO(H) blood-group glycosyltransferase B., Letts JA, Persson M, Schuman B, Borisova SN, Palcic MM, Evans SV, Acta Crystallogr D Biol Crystallogr. 2007 Aug;63(Pt 8):860-5. Epub 2007, Jul 17. PMID: 17642512

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