3JD4:
reference: Using Cryo-EM to Map Small Ligands on Dynamic Metabolic Enzymes: Studies with Glutamate Dehydrogenase., Borgnia MJ, Banerjee S, Merk A, Matthies D, Bartesaghi A, Rao P, Pierson J, Earl LA, Falconieri V, Subramaniam S, Milne JL, Mol Pharmacol. 2016 Jun;89(6):645-51. doi: 10.1124/mol.116.103382. Epub 2016 Apr , 1. PMID: 27036132

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