5HPU:
reference: 4S-Hydroxylation of Insulin at ProB28 Accelerates Hexamer Dissociation and Delays Fibrillation., Lieblich SA, Fang KY, Cahn JKB, Rawson J, LeBon J, Ku HT, Tirrell DA, J Am Chem Soc. 2017 Jun 28;139(25):8384-8387. doi: 10.1021/jacs.7b00794. Epub, 2017 Jun 20. PMID: 28598606

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).