2XBP:
reference: A novel signal transduction protein P(II) variant from Synechococcus elongatus PCC 7942 indicates a two-step process for NAGK-P(II) complex formation., Fokina O, Chellamuthu VR, Zeth K, Forchhammer K, J Mol Biol. 2010 Jun 11;399(3):410-21. Epub 2010 Apr 24. PMID: 20399792

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