Chromatograms from GC-MS analysis of BjKS, either wild-type (WT) or A167S mutant, as indicated. Extracts from E. coli cultures engineered to produce 1 and co-expressing the indicated BjKS. Peaks are numbered as in the text, with 1’ indicating the dephosphorylated derivative of 1 produced by endogenous phosphatases (1’, ent-copalol; 2, ent-pimara-8(14),15-diene; 3, ent-pimara-7,15-diene; 5, ent-kaur-16-ene), as identified by comparison to authentic standards.