2RDR:
reference: Crystal Structure of the Non-heme Iron Dioxygenase PtlH in Pentalenolactone Biosynthesis., You Z, Omura S, Ikeda H, Cane DE, Jogl G, J Biol Chem. 2007 Dec 14;282(50):36552-60. Epub 2007 Oct 16. PMID: 17942405

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