NFS386H1 Lecture Notes - Lecture 9: Phytoene Synthase, Pearl Barley, Phytoene
5 Jan 2019
School
Department
Course
Professor
Document Summary
Pyruvate geranylgeranyl-diphosphate (ggpp) can be converted to vite: ggpp all-trans lycopene (transgenes, enzymes added to plant: psy, Pds, zds: psy = phytoene synthase (from corn, crti (bacterial desaturase): pds = phytoene desaturase; zds = carotene-desaturase; crtiso = carotene cis-trans isomerase (found to be present in rice, all-trans lycopene -carotene, by lycopene cyclase ( -lcy) 85% of carotenoids forms -carotene, 15% -carotene, zeaxanthin, lutein. Sweet corn: high sugar, low starch: approved for use in canada as cattle feed. Alternative to the supplementation of corn with added lysine (which has to be measured and mixed. Transgene: feedback-insensitive enzyme required for the biosynthesis of lysine (the biosynthetic pathway gets down-regulated with the presence of lysine: barley helps lower cholesterol, which is a risk factor for cvd. Glucan levels similar to oats; high-lysine varieties (low yields) Proteins: gluten, low in lysine (essential, hard to get) Lipids: low fat; in embryo (germ); carotenoids (va) and tecopherol (ve) highest in oats.
