6EK9:
reference: A cytosolic copper storage protein provides a second level of copper tolerance in Streptomyces lividans., Straw ML, Chaplin AK, Hough MA, Paps J, Bavro VN, Wilson MT, Vijgenboom E, Worrall JAR, Metallomics. 2018 Jan 24;10(1):180-193. doi: 10.1039/c7mt00299h. PMID: 29292456

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