3HCG:
reference: Methionine sulfoxide reductase B displays a high level of flexibility., Ranaivoson FM, Neiers F, Kauffmann B, Boschi-Muller S, Branlant G, Favier F, J Mol Biol. 2009 Nov 20;394(1):83-93. Epub 2009 Sep 4. PMID: 19733575

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