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GC-MS chromatograms of hexane extract from E. coli metabolically engineered to produce ent-CPP and expressing the KS from either X. translucens pv. translucens (XttKS) or E. tracheiphila (EtKS), and of an authentic ent-kaurene standard. (Right Panel) Cyclization of ent-CPP to ent-kaurene catalyzed by KSs.
