Lecture_O - Lipid Metabolism Part I • Lipoproteins • Digestion of Lipids • Transport of lipoproteins • Bile acids Learning Objectives •

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Unformatted text preview: Lipid Metabolism. Part I • Lipoproteins • Digestion of Lipids • Transport of lipoproteins • Bile acids Learning Objectives • Functions of Lipids • Endocytosis unctions of Lipids • Components of biomembranes • Energy reserves: Camel’s hump Hibernating mammals Migrating birds • Energy source: fatty acids are more reduced (have less oxygen atoms) than carbohydrates and, therefore, conserve more energy. • Hormones Figure 19-5 ipoproteins • Lipids are poorly soluble in aqueous solution. They are transported via bloodstream in complex with proteins. The complexes are taken up by cells in a receptor-mediated process. • Lipoproteins are micelle-like particles. The hydrophobic core contains triacylglycerols and cholesteryl esters. • The amphiphilic surface consists of apolipoprotein, phospholipids, and cholesterol. Five Classes of Lipoproteins 1. Chylomicrons: transport dietary triacylglycerols and cholesterol from the intestine to the tissues. 2. Very low density lipoproteins ( VLDL ) 3. Intermediate density lipoproteins ( IDL ) 4. Low density lipoproteins ( LDL ). VLDL, IDL, and LDL transport internally produced triacylglycerols and cholesterol...
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This note was uploaded on 01/27/2011 for the course BIOCH 2EE3 taught by Professor Zhorovb during the Spring '10 term at McMaster University.

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Lecture_O - Lipid Metabolism Part I • Lipoproteins • Digestion of Lipids • Transport of lipoproteins • Bile acids Learning Objectives •

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