1Q9G:
reference: NMR structure of the integral membrane protein OmpX., Fernandez C, Hilty C, Wider G, Guntert P, Wuthrich K, J Mol Biol 2004 Mar 5;336(5):1211-21. PMID: 15037080

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