5MBA:
reference: Binding mode of azide to ferric Aplysia limacina myoglobin. Crystallographic analysis at 1.9 A resolution., Mattevi A, Gatti G, Coda A, Rizzi M, Ascenzi P, Brunori M, Bolognesi M, J Mol Recognit 1991 Feb;4(1):1-6. PMID: 1931125

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