4L3K:
reference: Selectivity of Ni(II) and Zn(II) binding to Sporosarcina pasteurii UreE, a metallochaperone in the urease assembly: a calorimetric and crystallographic study., Zambelli B, Banaszak K, Merloni A, Kiliszek A, Rypniewski W, Ciurli S, J Biol Inorg Chem. 2013 Dec;18(8):1005-17. doi: 10.1007/s00775-013-1049-6. Epub, 2013 Oct 15. PMID: 24126709

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