2VIM:
reference: The Fasciola hepatica thioredoxin: High resolution structure reveals two oxidation states., Line K, Isupov MN, Garcia-Rodriguez E, Maggioli G, Parra F, Littlechild JA, Mol Biochem Parasitol. 2008 Jun 21. PMID: 18620002

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