6IB5:
reference: Structure-based switch of regioselectivity in the flavin-dependent tryptophan 6-halogenase Thal., Moritzer AC, Minges H, Prior T, Frese M, Sewald N, Niemann HH, J Biol Chem. 2018 Dec 17. pii: RA118.005393. doi: 10.1074/jbc.RA118.005393. PMID: 30559288

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