1 / 47

Fig. 10.01

Fig. 10.01. Fig. 10.02. Membranes are composed of diacylglycerols – Glycerol with two fatty acids Storage lipids are triglycerides – a glycerol with three fatty acids. Fig. 10.5. Fig. 10.03. Box 10.1. Oleic acid. Δ 9. 18:1. Elaidic acid. Δ 9t. 18:1. Some Common Lipids (See Table 10.2).

quinto
Download Presentation

Fig. 10.01

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fig. 10.01

  2. Fig. 10.02

  3. Membranes are composed of diacylglycerols – Glycerol with two fatty acids • Storage lipids are triglycerides – a glycerol with three fatty acids

  4. Fig. 10.5

  5. Fig. 10.03

  6. Box 10.1 Oleic acid Δ9 18:1 Elaidic acid Δ9t 18:1

  7. Some Common Lipids (See Table 10.2) • Palmitic acid C16:0 • Stearic acid C18:0 • Oleic acid C18:1 • Linoleic acid C18:2 Δ9 Δ9, 12

  8. Fatty acids are made from acetyl-CoA

  9. Fig. 10.9

  10. Fig. 10.11

  11. Fig. 10.8 Fig. 2.08

  12. Fig. 10.16

  13. Most plant membranes are made of phospholipids • However the chloroplast is composed mostly of galactolipids (MGDG and DGDG) and sulfolipids

  14. Box 10.4

  15. LIPIDS • Fatty Acids are synthesized in chloroplasts • Diacylglycerols (DAG) are made in both chloroplast envelopes and the ER • If the 2-position has a 16:0 lipid the DAG was made in the chloroplast envelope • If the 2 position is 18:1 then the DAG was made in the ER

  16. See Table 10.3 for structures of head groups Fig. 10.5

  17. Fig. 10.21

  18. (7)

  19. Prokaryotic pathway (in the plastid)

  20. Eukaryotic pathway In the ER

  21. Fig. 10.18

  22. Fig. 10.25

  23. Fig. 10.26

  24. Fig. 10.29

  25. Fig. 10.30

  26. Fig. 10.31

  27. Fig. 10.33

  28. Fig. 10.34

  29. Fig. 10.37

  30. Fig. 10.39

  31. Fig. 10.40

  32. Fig. 10.42

  33. Fig. 10.44

  34. Plants store lipids in oil bodies • These are composed of triglycerides • Oil bodies bud off of the ER • A number of plants contain unusual fatty acids in their oli bodies • Rape seed – Erucic acid (C22:1 ) • Caster oil – ricinoleic acid (12-OH C18:1 ) Δ13 Δ9

  35. Fig. 10.63

  36. Fig. 10.64

  37. Fig. 10.65

  38. Fig. 10.66

  39. Breakdown of stored lipids • This occurs in germinating seeds • Plants can convert stored lipids to hexoses for transport • Fatty acids hexoses sucrose • Sucrose is transported to the growing tissues

  40. Breakdown of stored lipids • Fatty acids are broken down to acetyl CoA via beta oxidation • Occurs in the glyoxysome • Acetyl CoA is then converted to succinate via the glyoxylate cycle also in the glyoxysome • Succinate is converted to PEP in the mitochondria and cytoplasm • PEP is converted to sugar via gluconeogenesis

  41. Fig. 10.67

  42. Peroxide is a toxic biproduct Fig. 10.68

More Related