3PQC:
reference: Structure of an essential GTPase, YsxC, from Thermotoga maritima., Chan KH, Wong KB, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Jun 1;67(Pt, 6):640-6. Epub 2011 May 24. PMID: 21636901

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