BSC-2010 Lecture Notes - Lecture 6: Cardiovascular Disease, Organelle, Lipid Bilayer

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Lipids have little or no a nity for water. Structures are dominated by non polar covalent bonds. Fats large molecules assembled from glycerol and fatty acids by dehydration reactions. Ester linkage bond between hydroxyl and carboxyl groups. Triacylglycerol three fatty acids joined to glycerol by ester linkages. 3 fatty acids can be same or di erent. Non polar c-h bonds in the long hydrocarbon skeleton make fats hydrophobic. Fatty acids linked to glycerol can be di erent. Vary in the number and locations of double bonds. Formed by removal of h atoms from the carbon skeleton. 1 gram of fat stores more than twice as much energy as 1 gram of polysaccharide. Humans and other mammals store fats as long-term energy reserves in adipose cells. 2 fatty acids phosphate group at 3rd position of glycerol phosphate group is negatively charged other smaller groups may be attached to the phosphate group. Membrane lipid bilayer states together through hydrophobic intearctions.

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