Chapter 17 Naturally Occurring Oxygen-Containing Compounds Lipids Fats and Waxes (also called saponifiable lipids) the simplest lipids fats known as triglycerides waxes from long, straight-chain alcohols saponification (hydrolysis in NaOH to fatty acid salt and glycerol) micelles (soap-like hydrophobic and hydrophilic parts organize above a “critical micelle concentration” into a dynamic spherical structure) bilayer membranes (sandwich-like micelle of phospholipid with hydrophobic regions on inside and hydrophilic regions away surrounded by aqueous solution Terpenes (non-saponifiable lipids) comprised of “isoprenoid sub-units”, over 22,000 known natural terpenes Steroids fused 6, 6 6, 5 rings 3 1

Chapter 17 Naturally Occurring Oxygen-Containing Compounds Understand the basic formation of waxes, fats, micelles, and bilayer membranes soap via a saponification the fused 6,6,6,5 ring structure of a steroid Be able to identify the isoprenoid sub-units in a terpene