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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: Nat Prod Rep. 2014 Oct;31(10):1449–1473. doi: 10.1039/c4np00075g

Scheme 11. Proposed biosynthetic pathway to gibberellic acids (GA) in F. fujikuroi.

Scheme 11

Production of the intermediate ent-kaurene 80 from GGPP 5 is catalyzed by a bifunctional CPS/KS type diterpene synthase (see Scheme 9). Ent-kaurene 80 is oxidized to the final product GA1 by four cytochrome P450s.