1VLX:
reference: The metal site of Pseudomonas aeruginosa azurin, revealed by a crystal structure determination of the Co(II) derivative and Co-EPR spectroscopy., Bonander N, Vanngard T, Tsai LC, Langer V, Nar H, Sjolin L, Proteins 1997 Mar;27(3):385-94. PMID: 9094740

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