1QFA:
reference: Helical structure and self-association in a 13 residue neuropeptide Y Y2 receptor agonist: relationship to biological activity., Barnham KJ, Catalfamo F, Pallaghy PK, Howlett GJ, Norton RS, Biochim Biophys Acta 1999 Nov 16;1435(1-2):127-37. PMID: 10561544

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