Triacylglycerols - PowerPoint PPT Presentation

LIPID METABOLISM

LIPID METABOLISM. Why Fatty Acids?. (For energy storage?) Two reasons: The carbon in fatty acids (mostly CH 2 ) is almost completely reduced (so its oxidation yields the most energy possible).

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Lipid Metabolism

Lipid Metabolism. Remember fats?? Triacylglycerols - major form of energy storage in animals Your energy reserves: ~0.5% carbs (glycogen + glucose) ~15% protein (muscle, last resort) ~85% fat Why use fat for energy? 1 gram fat = at least 6-fold more energy than 1 gram carb Sources of fat:

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Lipids (fats)

Lipids (fats). Ooh, totally aliphatic!. Lipids characteristics. Efficient storage of energy !!! Nonpolar or low polarity Many have a polar end (hydrophilic) and a nonpolar end (hydrophobic) = amphipathic molecules Insoluble in water Two major groupings: Hydrolyzable Nonhydrolyzable.

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