5F2V:
reference: Catalytic mechanism and allosteric regulation of an oligomeric (p)ppGpp synthetase by an alarmone., Steinchen W, Schuhmacher JS, Altegoer F, Fage CD, Srinivasan V, Linne U, Marahiel MA, Bange G, Proc Natl Acad Sci U S A. 2015 Oct 27;112(43):13348-53. doi:, 10.1073/pnas.1505271112. Epub 2015 Oct 12. PMID: 26460002

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