1PXZ:
reference: Crystal Structure of Jun a 1, the Major Cedar Pollen Allergen from Juniperus ashei, Reveals a Parallel beta-Helical Core., Czerwinski EW, Midoro-Horiuti T, White MA, Brooks EG, Goldblum RM, J Biol Chem 2005 Feb 4;280(5):3740-6. Epub 2004 Nov 10. PMID: 15539389

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