1VFI:
reference: Solution structure of Vanabin2, a vanadium(IV)-binding protein from the vanadium-rich ascidian Ascidia sydneiensis samea., Hamada T, Asanuma M, Ueki T, Hayashi F, Kobayashi N, Yokoyama S, Michibata H, Hirota H, J Am Chem Soc 2005 Mar 30;127(12):4216-22. PMID: 15783203

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