1NZR:
reference: Structure of the azurin mutant nickel-Trp48Met from Pseudomonas aeruginosa at 2.2 A resolution., Tsai LC, Sjolin L, Langer V, Bonander N, Karlsson BG, Vanngard T, Hammann C, Nar H, Acta Crystallogr D Biol Crystallogr. 1995 Sep 1;51(Pt 5):711-7. PMID: 15299800

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