1PDO:
reference: Structure of the IIA domain of the mannose transporter from Escherichia coli at 1.7 angstroms resolution., Nunn RS, Markovic-Housley Z, Genovesio-Taverne JC, Flukiger K, Rizkallah PJ, Jansonius JN, Schirmer T, Erni B, J Mol Biol 1996 Jun 14;259(3):502-11. PMID: 8676384

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