3A1C:
reference: Nucleotide recognition by CopA, a Cu+-transporting P-type ATPase., Tsuda T, Toyoshima C, EMBO J. 2009 Jun 17;28(12):1782-91. Epub 2009 May 28. PMID: 19478797

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