3FIQ:
reference: Structure of rat odorant-binding protein OBP1 at 1.6 A resolution., White SA, Briand L, Scott DJ, Borysik AJ, Acta Crystallogr D Biol Crystallogr. 2009 May;65(Pt 5):403-10. Epub 2009, Apr 18. PMID: 19390145

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