2YX9:
reference: Trapping of a dopaquinone intermediate in the TPQ cofactor biogenesis in a copper-containing amine oxidase from Arthrobacter globiformis., Moore RH, Spies MA, Culpepper MB, Murakawa T, Hirota S, Okajima T, Tanizawa K, Mure M, J Am Chem Soc. 2007 Sep 19;129(37):11524-34. Epub 2007 Aug 23. PMID: 17715921

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