The life functions of the cell have to be retained throughout this temperature range. Most natural fats contain a complex mixture of different TAGs and therefore melt in a wide temperature range. Therefore, ruminant fat also contains acids with an odd number of carbon atoms, for example 15 or 17, because they are produced by bacteria in the rumen. Bacteria, however, have the ability to synthesize acids with odd chain lengths and branched chains. Natural fatty acids in plants and animals are typically composed of only even-numbered chain lengths because they are biosynthesized from acetyl-CoA. The length of the fatty acid chains in naturally occurring TAG may vary, but the most common are chains having 16, 18, 20, or 22 carbon atoms. The three fatty acids RCOOH, R'COOH and R"COOH may be completely different, or two of them or all of them may be identical. The chemical formula of TAG is RCOO-CH 2-CH(-OOCR')CH 2OOCR" wherein R, R', and R" are long alkyl chains. TAG are formed by one molecule of glycerol esterified by fatty acid molecules in all three OH groups. Triacylglycerols (TAGs) are chemical compounds that are major components of vegetable oils and animal fats. Institute of Microbiology, Prague, Czech Republic Home Lipid Analysis Lipidomics A Chemical Study of Oils and Fats of Animal Origin.Scientific Milestones in Lipid Research. The History of Lipid Science & Technology.Metabolism and Function of Very-Long-Chain Polyunsaturated Fatty Acids (>C24) in Mammals.Silica Hydrogel and its Use in Edible Oil Processing.Meal Desolventizing, Toasting, Drying and Cooling.Selected Topics in the Analysis of Lipids.
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