3RN0:
reference: Mutagenesis of tryptophan199 suggests that hopping is required for MauG-dependent tryptophan tryptophylquinone biosynthesis., Tarboush NA, Jensen LM, Yukl ET, Geng J, Liu A, Wilmot CM, Davidson VL, Proc Natl Acad Sci U S A. 2011 Oct 11;108(41):16956-61. Epub 2011 Oct 3. PMID: 21969534

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