6K3C:
reference: Asymmetric Open-Closed Dimer Mechanism of Polyhydroxyalkanoate Synthase PhaC., Chek MF, Kim SY, Mori T, Tan HT, Sudesh K, Hakoshima T, iScience. 2020 May 22;23(5):101084. doi: 10.1016/j.isci.2020.101084. Epub 2020, Apr 21. PMID: 32388399

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