1N22:
reference: Bornyl diphosphate synthase: structure and strategy for carbocation manipulation by a terpenoid cyclase., Whittington DA, Wise ML, Urbansky M, Coates RM, Croteau RB, Christianson DW, Proc Natl Acad Sci U S A 2002 Nov 26;99(24):15375-80. Epub 2002 Nov 13. PMID: 12432096

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