1NID:
reference: The structure of copper-nitrite reductase from Achromobacter cycloclastes at five pH values, with NO2- bound and with type II copper depleted., Adman ET, Godden JW, Turley S, J Biol Chem 1995 Nov 17;270(46):27458-74. PMID: 7499203

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