6IQZ:
reference: Redox potential-dependent formation of an unusual His-Trp bond in bilirubin oxidase., Akter M, Tokiwa T, Shoji M, Nishikawa K, Shigeta Y, Sakurai T, Higuchi Y, Kataoka K, Shibata N, Chemistry. 2018 Aug 29. doi: 10.1002/chem.201803798. PMID: 30156345

This OCA Structure page
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