Write an account of classification of lipids with suitable examples

lipids examples

Lipids are used by organisms for energy storage, as a signalling molecule e. Examples of common lipids include butter, vegetable oil, cholesterol and other steroids, waxes, phospholipids, and fat-soluble vitamins. The Nutrition Source, a website maintained by the Department of Nutrition at the Harvard School of Public Healthsummarizes the current evidence on the impact of dietary fat: "Detailed research—much of it done at Harvard—shows that the total amount of fat in the diet isn't really linked with weight or disease.

In animals and archaeathe mevalonate pathway produces these compounds from acetyl-CoA, [93] while in plants and bacteria the non-mevalonate pathway uses pyruvate and glyceraldehyde 3-phosphate as substrates.

classification of lipids in plants

Rather, weight gain is a consequence of excess consumption of any type of food, combined with metabolic factors. Carotenoids are important simple isoprenoids that function as antioxidants and as precursors of vitamin A. Fats are more common in animals, while oils are prevalent in plants and fish.

classification of lipids biology discussion

This involves the synthesis of fatty acids from acetyl-CoA and the esterification of fatty acids in the production of triglycerides, a process called lipogenesis. Unlike the case of genes and proteins which are primarily composed of linear combinations of 4 nucleic acids and 20 amino acids, respectively, lipid structures are generally much more complex due to the number of different biochemical transformations which occur during their biosynthesis.

The saccharolipid SL category was created to account for lipids in which fatty acyl groups are linked directly to a sugar backbone.

Types of lipids

In an aqueous system, the polar heads of lipids align towards the polar, aqueous environment, while the hydrophobic tails minimize their contact with water and tend to cluster together, forming a vesicle ; depending on the concentration of the lipid, this biophysical interaction may result in the formation of micelles , liposomes , or lipid bilayers. The fragment of a carboxylic acid not including the hydroxyl OH group is called an acyl group. References Akoh C. It also explains how living organisms obtain fatty acids, both from their diets and through metabolic breakdown of stored fats. Biosynthesis[ edit ] In animals, when there is an oversupply of dietary carbohydrate, the excess carbohydrate is converted to triglycerides. Structure Biological fatty acids, members of the class of compounds known as carboxylic acids , are composed of a hydrocarbon chain with one terminal carboxyl group COOH. The Lipid Metabolites and Pathways Strategy LIPID MAPS consortium is actively involved in an integrated approach for the detection, quantitation and pathway reconstruction of lipids and related genes and proteins at a systems-biology level.
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Lipid classification, structures and tools