1SUM:
reference: Crystal structure of a PhoU protein homologue: a new class of metalloprotein containing multinuclear iron clusters., Liu J, Lou Y, Yokota H, Adams PD, Kim R, Kim SH, J Biol Chem 2005 Apr 22;280(16):15960-6. Epub 2005 Feb 16. PMID: 15716271

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