1EKM:
reference: Crystal structure at 2.5 A resolution of zinc-substituted copper amine oxidase of Hansenula polymorpha expressed in Escherichia coli., Chen Z, Schwartz B, Williams NK, Li R, Klinman JP, Mathews FS, Biochemistry 2000 Aug 15;39(32):9709-17. PMID: 10933787

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