2ONH:
reference: Structure of limonene synthase, a simple model for terpenoid cyclase catalysis., Hyatt DC, Youn B, Zhao Y, Santhamma B, Coates RM, Croteau RB, Kang C, Proc Natl Acad Sci U S A. 2007 Mar 27;104(13):5360-5. Epub 2007 Mar 19. PMID: 17372193

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