Figure 1.
Production of EPA and DHA in C. sativa. (a) Biosynthetic pathway for the production of the LC-PUFAs EPA and DHA, with the various enzyme activities shown in different colours [also used in (b)]. (b) Simplified maps of vectors p5_EPA and p7_DHA used for transformation of C. sativa. Abbreviations: Cnl, conlinin 1 promoter for the gene encoding the flax 2S storage protein conlinin; USP, promoter region of the unknown seed protein of Vicia faba; SBP, sucrose binding protein 1800 promoter; NP, napin; OtΔ6, Δ6-desaturase from O. tauri; TcΔ5, a Δ5-desaturase from Thraustochytrium sp.; Piw3, ω3-desaturase from Phytophthora infestans; PsΔ12, a Δ12-desaturase from Phytophthora sojae; EhΔ4, Δ4-desaturase from E. huxleyi; PSE1, a Δ6-elongase from P. patens; OtElo5, Δ5-elongase from O. tauri; OCS, 35S, E9 and CatpA represent terminators.