1ZA3:
reference: Molecular recognition by a binary code., Fellouse FA, Li B, Compaan DM, Peden AA, Hymowitz SG, Sidhu SS, J Mol Biol 2005 May 20;348(5):1153-62. Epub 2005 Apr 1. PMID: 15854651

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