5NBD:
reference: Structural basis of inhibition of lipid-linked oligosaccharide flippase PglK by a conformational nanobody., Perez C, Kohler M, Janser D, Pardon E, Steyaert J, Zenobi R, Locher KP, Sci Rep. 2017 Apr 19;7:46641. doi: 10.1038/srep46641. PMID: 28422165

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