6M4Q:
reference: Uncovering the cytochrome P450-catalyzed methylenedioxy bridge formation in streptovaricins biosynthesis., Sun G, Hu C, Mei Q, Luo M, Chen X, Li Z, Liu Y, Deng Z, Zhang Z, Sun Y, Nat Commun. 2020 Sep 9;11(1):4501. doi: 10.1038/s41467-020-18336-5. PMID: 32908132

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