VETS1032 Lecture Notes - Lecture 12: Rancidification, Autoxidation, Triglyceride
24 Jul 2018
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Document Summary
Lipid structure: lipids are water insoluble, oily or greasy organic macromolecules which are composed of fatty acid. Lipids are composed of fa has a hydrophilic carboxylic acid head and a hydrophobic hydrocarbon tail. The polar head and the non polar tail results in the formation of lipid bilayers (amphipathic: sphingolipids important in membranes, has polar head and 2 non polar tails. Cholesterol is the precursor to all the steroid hormone. E. g cholesterol which are found in many cell membranes and testosterone which are found in male sex hormones: lipoproteina 4 classes of lipoprotein in blood plasma. It has a hydrophilic polypeptide chains and polar lipids on surface with a hydrophobic polypeptide chains, triacylglycerols and sterols inside. Lipoproteins are a method of transporting water insoluble lipids around the body: waxes esters of fa are 14-36 carbon atoms and long chains of alcohols are 16-22 carbin atoms.
