3CFX:
reference: Distorted octahedral coordination of tungstate in a subfamily of specific binding proteins., Hollenstein K, Comellas-Bigler M, Bevers LE, Feiters MC, Meyer-Klaucke W, Hagedoorn PL, Locher KP, J Biol Inorg Chem. 2009 Feb 21. PMID: 19234723

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