4AK0:
reference: Ligand-Controlled Assembly of Hexamers, Dihexamers, and Linear Multihexamer Structures by the Engineered Acylated Insulin Degludec., Steensgaard DB, Schluckebier G, Strauss HM, Norrman M, Thomsen JK, Friderichsen AV, Havelund S, Jonassen I, Biochemistry. 2013 Jan 3. PMID: 23256685

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