6BXN:
reference: Organometallic and radical intermediates reveal mechanism of diphthamide biosynthesis., Dong M, Kathiresan V, Fenwick MK, Torelli AT, Zhang Y, Caranto JD, Dzikovski B, Sharma A, Lancaster KM, Freed JH, Ealick SE, Hoffman BM, Lin H, Science. 2018 Mar 16;359(6381):1247-1250. doi: 10.1126/science.aao6595. PMID: 29590073

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