1IRE:
reference: Crystal structure of cobalt-containing nitrile hydratase., Miyanaga A, Fushinobu S, Ito K, Wakagi T, Biochem Biophys Res Commun 2001 Nov 16;288(5):1169-74. PMID: 11700034

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