1USP:
reference: The structure of the organic hydroperoxide resistance protein from Deinococcus radiodurans. Do conformational changes facilitate recycling of the redox disulfide?, Meunier-Jamin C, Kapp U, Leonard GA, McSweeney S, J Biol Chem 2004 Jun 11;279(24):25830-7. Epub 2004 Mar 30. PMID: 15054099

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