1TDF:
reference: Crystal structure of Escherichia coli thioredoxin reductase refined at 2 A resolution. Implications for a large conformational change during catalysis., Waksman G, Krishna TS, Williams CH Jr, Kuriyan J, J Mol Biol 1994 Feb 25;236(3):800-16. PMID: 8114095

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