2OY8:
reference: Aromatic cross-strand ladders control the structure and stability of beta-rich peptide self-assembly mimics., Biancalana M, Makabe K, Koide A, Koide S, J Mol Biol. 2008 Oct 31;383(1):205-13. Epub 2008 Aug 22. PMID: 18762191

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