Any fat related substance that contains phosphorus, fatty acids, and a nitrogen-containing base. A three-carbon alcohol used to form triglycerides. Major form of lipid in the body and in food. As a result, phospholipids are considered amphipathic because they have both hydrophobic and hydrophilic components. Composed of three fatty acids bonded to glycerol. In glycerophospholipids, fatty acids are linked through an ester oxygen to carbons 1 and 2 of glycerol, the backbone of the molecule. At the bottom is the common phospholipid phosphatidylcholine. A fat molecule consists of two kinds of parts: a glycerol backbone and three fatty acid tails. 2 : 328 The middle structure is a triglyceride composed of oleoyl, stearoyl, and palmitoyl chains attached to a glycerol backbone. The different backbone molecule differentiates. Phospholipids are a special type of lipid associated with cell membranes and typically have a glycerol (or sphingosine) backbone to which two fatty acid chains and a phosphate-containing group are attached. major reference In lipid: Glycerophospholipids Lipids of this class are the most abundant in biological membranes. At the top are cholesterol 1 and oleic acid. Remember that the other three biological macromolecules - carbohydrates, proteins, and nucleic acids - are polymers composed of small molecules called monomers. Linking the polar head group to the fatty acid tail is a backbone made up of either glycerol or sphingosine.
0 Comments
Leave a Reply. |