ch10 - 3/22/2011 6 10-7 Structural lipids in membranes...

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3/22/2011 1 Lipids Chapter 10 Lipids : insoluble in water , extractable by organic solvents of low polarity (e.g. ether, chloroform) 5 major physiological roles: 1. energy storage (e.g. triacylglycerols) 2. structural (membranes) 3. Thermal and mechanical insulation 4. Vitamins and hormones (e.g. vitamins A, D; steroids) 5. solubilization of other lipids (e.g. bile acids)
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3/22/2011 2 Why do double bonds lower melting temp? saturated unsaturated 10-1 cis double bond
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3/22/2011 3 Nonpolar, hydrophobic Polar, hydrophilic Amphipathic fatty acids spontaneously organize in water This is basis for soap/detergent action
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3/22/2011 4 A wax is a simple ester between a fatty acid and a fatty alcohol Oleyl oleiate is a component of bees wax. Waxes are also common in plants to protect fruit from the elements. It also can be used to protect the finish on your furniture or your car. Triacylglycerols: Three fatty acids esterified to the tri alcohol, glycerol 10-3 This is FAT
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3/22/2011 5 10-4 Adipocytes = fat cells capillary cytoplasm Giant fat vacuole
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Unformatted text preview: 3/22/2011 6 10-7 Structural lipids in membranes 10-14 3/22/2011 7 Glycerol-3-phosphate Phosphoglycerides 10-9 A An Note: fatty acids can be any thing, there is no set composition for acyl glycerides 10-9 3/22/2011 8 A variety of phospholipase enzymes hydrolyze phospholipids Phospholipase C is particularly famous for its role in releasing inositol triphosphate (IP3) as part of cell signaling. 10-13 Sphingo lipids 3/22/2011 9 10-13 10-15 Glycosylated sphingo lipids are major markers of blood group antigens, types A, B, AB, and O. Glc-Gal-NacGal-Fuc 3/22/2011 10 Box 10-2 Many diseases arise from errors in ceramide metabolism Eicosanoids: local mediators or paracrine hormones NSAID = non-steroidal anti-inflammatory drug 3/22/2011 11 COX inhibitors combat inflammation (Advil) Sterols 10-17 cholesterol 3/22/2011 12 Steroid hormones 10-19 10-20 Fat soluble vitamins : Vitamin D 3/22/2011 13 Isoprenoids Note: b-carotene made from isoprene 10-22...
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This note was uploaded on 05/01/2011 for the course CH 53890 taught by Professor Raymonds during the Spring '09 term at University of Texas at Austin.

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ch10 - 3/22/2011 6 10-7 Structural lipids in membranes...

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