6DS9:
reference: Clarifying the Copper Coordination Environment in a de Novo Designed Red Copper Protein., Koebke KJ, Ruckthong L, Meagher JL, Mathieu E, Harland J, Deb A, Lehnert N, Policar C, Tard C, Penner-Hahn JE, Stuckey JA, Pecoraro VL, Inorg Chem. 2018 Oct 1;57(19):12291-12302. doi: 10.1021/acs.inorgchem.8b01989., Epub 2018 Sep 18. PMID: 30226758

This OCA Structure page
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