3J6D:
reference: The Modular Structure of the Inner-Membrane Ring Component PrgK Facilitates Assembly of the Type III Secretion System Basal Body., Bergeron JR, Worrall LJ, De S, Sgourakis NG, Cheung AH, Lameignere E, Okon M, Wasney GA, Baker D, McIntosh LP, Strynadka NC, Structure. 2015 Jan 6;23(1):161-72. doi: 10.1016/j.str.2014.10.021. Epub 2014 Dec, 18. PMID: 25533490

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