2H67: Nmr Structure Of Human Insulin Mutant His-B5-Ala, His-B10- Asp Pro-B28-Lys, Lys-B29-Pro, 20 Structures
reference: A conserved histidine in insulin is required for the foldability of human proinsulin. Structure and function of an Alab5 analog., Hua QX, Liu M, Hu SQ, Jia W, Arvan P, Weiss MA, J Biol Chem. 2006 May 25;. PMID: 16728398

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