Classification And Grouping Of Lipids

LipidsTARBEI40Lipids are non-polar(hydrophobic) compounds, soluble in organic solvents. Most membrane lipids are amphipathic, having a non-polarend and a polarend.Fatty acidsconsist of a hydrocarbon chain with a carboxylic acid at one end. A 16-C fatty acid: CH3(CH2)14-COO-Non-polar polarA 16-C fatty acid with one cis double bond between C atoms 9-10 may be represented as 16:1 cis D9.Classification of LipidsSimple LipidsTriglycerides, neutral fats: Found in adipose tissue, butterfat, lard, suet, fish oils, olive oil, corn oil, etc. Esters of three molecules of fatty acids plus one molecule of glycerol; the fatty acid may all be different. Waxes: beeswax, head oil of sperm whale, cerumen, carnauba oil, and lanolin. Composed of esters of fatty acids with alcohol other than glycerol; of industrial and medicinal importance.Compound LipidsPhospholipids(phosphatides): Found chiefly in animal tissues. Substituted fats, consisting of phosphatidic acid; composed of glycerol, fatty acids, and phosphoric acid bound in ester linkage to a nitrogenous base. Lecithin: Found in brain, egg yolk, and organ meats. Phosphatidyl choline ; phosphatide linked to choline; a lipotropic agent; important in fat metabolism and transport; used as emulsigying agent in the food industry. Cephalin: Occurs predominantly in nervous tissue. Phosphatidyl ethanolamine and serine. phosphatide linked to serine or ethanolamine; plays