2C29:
reference: Crystal structure of grape dihydroflavonol 4-reductase, a key enzyme in flavonoid biosynthesis., Petit P, Granier T, d'Estaintot BL, Manigand C, Bathany K, Schmitter JM, Lauvergeat V, Hamdi S, Gallois B, J Mol Biol. 2007 May 18;368(5):1345-57. Epub 2007 Mar 6. PMID: 17395203

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