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ch10 - 6 10-7 Structural lipids in membranes 10-14 7...

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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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