In this article we will discuss about the metabolism of sphingolipids, explained with the help of a suitable diagram. Sphingosine results from the condensation of palmityl-coenzyme A with serine. The next step consists in the binding of a fatty acid which gives a ceramide. This ceramide can react either with CDP-choline to form a sphingomyelin, or with UDP-galactose to give [...]
In this article we will discuss about the role of phospholipids. Biological membranes are mainly formed by proteins and lipids. In the latter group of constituents, phosphatides and cholesterol are the quantitatively dominant substances. The physical state of phosphatides varies with the temperature. Between the true liquid state and the solid state, these lipids pass through states in which they [...]
The following points highlight the four main groups of lipids. The groups are: 1. Triglycerides 2. Phospholipids (Membrane Lipids) 3. Steroids 4. Wax. Lipids: Group # 1. Triglycerides: One important group of stored lipids is triglycerides, a category that includes fats and oils. Triglycerides are composed of a single molecule of glycerol bound to three fatty acids (Fig. 7.1). Glycerol [...]