4DQ9:
reference: The 1.59A resolution structure of the minor pseudopilin EpsH of Vibrio cholerae reveals a long flexible loop., Raghunathan K, Vago FS, Grindem D, Ball T, Wedemeyer WJ, Bagdasarian M, Arvidson DN, Biochim Biophys Acta. 2013 Dec 4;1844(2):406-415. doi:, 10.1016/j.bbapap.2013.11.013. PMID: 24316251

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