3WGN:
reference: Structural change in FtsZ Induced by intermolecular interactions between bound GTP and the T7 loop., Matsui T, Han X, Yu J, Yao M, Tanaka I, J Biol Chem. 2014 Feb 7;289(6):3501-9. doi: 10.1074/jbc.M113.514901. Epub 2013, Dec 17. PMID: 24347164

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