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Diets triacylglycerolstags triacylglycerolstags

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Unformatted text preview: H O Glycerol backbone Most abundant type of lipid (40 % of calories in western diets) Triacylglycerols (TAGs) Triacylglycerols (TAGs) Neutral and water insoluble fat STORE in plant and animal cells 3 fatty acids ester linked to glycerol – simple (same fatty acids) – mixed (different fatty acids) H O cf: diacylglycerols, monoacylglycerols HCOC HCOC HC O OC H H O Glycerol backbone Most abundant type of lipid (40 % of calories in western diets) Triacylglycerols (TAGs) Triacylglycerols (TAGs) Neutral and water insoluble fat STORE in plant and animal cells 3 fatty acids ester linked to glycerol – simple (same fatty acids) – mixed (different fatty acids) H O cf: diacylglycerols, monoacylglycerols HCOC HCOC HC O OC H O H H Glycerol backbone Most abundant type of lipid (40 % of calories in western diets) How are TAGs hydrolysed? How are TAGs hydrolysed? Lipases (from pancreas) are enzymes that catalyse TAG glycerol + 3 free fatty acids Where do lipases occur? Small intestine and adipocytes (↑ exercise (FAs required as energy source)­ ↑ adipocyte lipase activity!!) Saponification – alkali hydrolysis of TAG to produce soap – hydrolysis with NaOH or KOH yields a mixture of K+ or Na+ soaps and glycerol The advantages of FAT The advantages of FAT A...
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