5WQF:
reference: Molecular basis for the unusual ring reconstruction in fungal meroterpenoid biogenesis., Mori T, Iwabuchi T, Hoshino S, Wang H, Matsuda Y, Abe I, Nat Chem Biol. 2017 Oct;13(10):1066-1073. doi: 10.1038/nchembio.2443. Epub 2017, Jul 31. PMID: 28759016

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