1AHJ:
reference: Crystal structure of nitrile hydratase reveals a novel iron centre in a novel fold., Huang W, Jia J, Cummings J, Nelson M, Schneider G, Lindqvist Y, Structure 1997 May 15;5(5):691-9. PMID: 9195885

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