5FCW:
reference: Structure of 'linkerless' hydroxamic acid inhibitor-HDAC8 complex confirms the formation of an isoform-specific subpocket., Tabackman AA, Frankson R, Marsan ES, Perry K, Cole KE, J Struct Biol. 2016 Sep;195(3):373-8. doi: 10.1016/j.jsb.2016.06.023. Epub 2016, Jun 29. PMID: 27374062

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