Triglycerides and phospholipids are complex lipids built with fatty acids and a glycerol backbone. Subscribe to Nourishable at / nourishable
This video is part 4 of the Lipid Foundations module within a lecture series on the nutrition science of macronutrients.
Lipid Foundations Lecture playlist: • Lipid Foundations
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References
Chapter 6 Lipids in Wardlaw’s Perspectives in Nutrition, 2019 (Editors: Byrd-Bredbenner, Moe, Berning and Kelley, 11th edition)
Chapter 4 - Lipids, Sterols, and their Metabolites in Modern Nutrition in Health and Disease, 2014 (Editors: Ross, Caballero, Cousins, Tucker and Ziegler; 11 edition)
Images by Wolfgang Schaefer, Public domain & OpenStax, CC BY 3.0, via Wikimedia Commons, OpenStax Anatomy & Physiology, CCA 4.0
A triacylglyercol, also called a triglyceride, has a glycerol backbone with three fatty acids. The carboxyl end of the fatty acid is attached to the glycerol backbone. Different kinds of fatty acids can be bound to the glycerol backbone. Triglycerides are primarily for energy storage. Glycerophospholipids, or phospholipids, have a three carbon glycerol backbone that is bound to two fatty acid tails and one phosphate group. The phosphate group is polar - a hydrophilic water-loving end. The fatty acid tails are hydrophobic or water-fearing. To make a triglyceride, we would undergo a dehydration reaction to bind the fatty acids to the glycerol backbone, losing a molecule of water per attached fatty acid.
28 сен 2024
