2RML:
reference: Structure and Cu(I)-binding properties of the N-terminal soluble domains of Bacillus subtilis CopA., Singleton C, Banci L, Ciofi-Baffoni S, Tenori L, Kihlken M, Boetzel R, Le Brun N, Biochem J. 2008 Jan 23;. PMID: 18215122

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