1IZA:
reference: Role of B13 Glu in insulin assembly. The hexamer structure of recombinant mutant (B13 Glu-->Gln) insulin., Bentley GA, Brange J, Derewenda Z, Dodson EJ, Dodson GG, Markussen J, Wilkinson AJ, Wollmer A, Xiao B, J Mol Biol 1992 Dec 20;228(4):1163-76. PMID: 1361949

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