6Y1A:
reference: Cryo-EM structure of islet amyloid polypeptide fibrils reveals similarities with amyloid-beta fibrils., Roder C, Kupreichyk T, Gremer L, Schafer LU, Pothula KR, Ravelli RBG, Willbold D, Hoyer W, Schroder GF, Nat Struct Mol Biol. 2020 Jul;27(7):660-667. doi: 10.1038/s41594-020-0442-4. Epub, 2020 Jun 15. PMID: 32541895

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