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. Author manuscript; available in PMC: 2015 Apr 9.
Published in final edited form as: Chem Rev. 2014 Mar 3;114(7):3659–3853. doi: 10.1021/cr400327t

Figure 207.

Figure 207

Enzymatic processes in fungi involving quercetin. A) Formation of quercetin from rutin by rutinase and 2) 2,4-dioxygenation of quercetin catalyzed by quercetin 2,4-dioxygenase, including ring and atom nomenclature for the quercetin ring.