5GQW:
reference: Bound Substrate in the Structure of Cyanobacterial Branching Enzyme Supports a New Mechanistic Model., Hayashi M, Suzuki R, Colleoni C, Ball SG, Fujita N, Suzuki E, J Biol Chem. 2017 Mar 31;292(13):5465-5475. doi: 10.1074/jbc.M116.755629. Epub, 2017 Feb 13. PMID: 28193843

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