3JSQ:
reference: X-ray crystallographic analysis of adipocyte fatty acid binding protein (aP2) modified with 4-hydroxy-2-nonenal., Hellberg K, Grimsrud PA, Kruse AC, Banaszak LJ, Ohlendorf DH, Bernlohr DA, Protein Sci. 2010 Aug;19(8):1480-9. PMID: 20509169

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