2PPE:
reference: Stable copper-nitrosyl formation by nitrite reductase in either oxidation state., Tocheva EI, Rosell FI, Mauk AG, Murphy ME, Biochemistry. 2007 Oct 30;46(43):12366-74. Epub 2007 Oct 9. PMID: 17924665

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