3PPD:
reference: Structure-based design of non-natural amino-acid inhibitors of amyloid fibril formation., Sievers SA, Karanicolas J, Chang HW, Zhao A, Jiang L, Zirafi O, Stevens JT, Munch J, Baker D, Eisenberg D, Nature. 2011 Jun 15. doi: 10.1038/nature10154. PMID: 21677644

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