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Lipolysis / l ɪ ˈ p ɒ l ɪ s ɪ s / is the metabolic pathway through which lipid triglycerides are hydrolyzed into a glycerol and free fatty acids. It is used to mobilize stored energy during fasting or exercise , and usually occurs in fat adipocytes .
The breakdown of this fat is known as lipolysis. The products of lipolysis, free fatty acids , are released into the bloodstream and circulate throughout the body. During the breakdown of triacylglycerols into fatty acids, more than 75% of the fatty acids are converted back into triacylglycerol, a natural mechanism to conserve energy, even in ...
The digestion products consisting of a mixture of tri-, di- and monoglycerides and free fatty acids, which, together with the other fat soluble contents of the diet (e.g. the fat soluble vitamins and cholesterol) and bile salts form mixed micelles, in the watery duodenal contents (see diagrams on the right).
Lipid metabolism is the synthesis and degradation of lipids in cells, involving the breakdown and storage of fats for energy and the synthesis of structural and functional lipids, such as those involved in the construction of cell membranes.
This page is the template for the metabolic pathways template. This template should be used to illustrate the general 'shape' of metabolism within the cell. This template is part of the Metabolic Pathways task force. This template has been largely superseded by {{Metabolic metro}} but is kept as an archive
An anabolic pathway is a biosynthetic pathway, meaning that it combines smaller molecules to form larger and more complex ones. [ 10 ] : 570 An example is the reversed pathway of glycolysis, otherwise known as gluconeogenesis , which occurs in the liver and sometimes in the kidney to maintain proper glucose concentration in the blood and supply ...
One pathway utilizes a Δ 9-desaturase (DesA) that catalyzes a double bond formation in membrane lipids. Another pathway uses two proteins, DesC and DesB, together to act as a Δ 9-desaturase, which inserts a double bond into a saturated fatty acid-CoA molecule. This second pathway is regulated by repressor protein DesT.
Another hormone that may affect lipogenesis through the SREBP-1 pathway is leptin. It is involved in the process by limiting fat storage through inhibition of glucose intake and interfering with other adipose metabolic pathways. [1] The inhibition of lipogenesis occurs through the down regulation of fatty acid and triglyceride gene expression. [10]
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