2R27:
reference: Structural characterization of zinc-deficient human superoxide dismutase and implications for ALS., Roberts BR, Tainer JA, Getzoff ED, Malencik DA, Anderson SR, Bomben VC, Meyers KR, Karplus PA, Beckman JS, J Mol Biol. 2007 Nov 2;373(4):877-90. Epub 2007 Aug 2. PMID: 17888947

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