Matthew M. Ravn, Robert M. Coates, Matthew M. Ravn, Reinhard Jetter and Rodney B. Croteau
The cyclization–rearrangement of deuterated geranylgeranyl diphosphate (GGPP) and (+)-copalyl diphosphate (CPP) catalyzed by recombinant (–)-abietadiene synthase from grand fir proceeds with intramolecular proton transfer from C-19 of GGPP, and from the C-17 pro-E position of CPP, to form the C-16 pro-S methyl group of (–)-abietadiene.