2K0Q:
reference: Molecular structure and metal-binding properties of the periplasmic CopK protein expressed in Cupriavidus metallidurans CH34 during copper challenge., Bersch B, Favier A, Schanda P, van Aelst S, Vallaeys T, Coves J, Mergeay M, Wattiez R, J Mol Biol. 2008 Jul 4;380(2):386-403. Epub 2008 May 15. PMID: 18533181

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