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The dashed lines indicate multiple step reactions. HMG1: HMG-CoA reductase, ERG9: squalene synthase. Carotenoids pathway: CrtE: GGPP synthase, BTS1: S. cerevisiae GGPP synthase, CrtYB: Lycopene cyclase, CrtI: Phytoene desaturase. IPP: isopentenyl pyrophosphate; DMAP: dimethylallyl pyrophosphate; GPP: geranyl pyrophosphate; FPP: farnesyl pyrophosphate; GGPP: geranylgeranyl pyrophosphate.
