FSN 210 Lecture Notes - Lecture 5: Diglyceride, Methyl Group, Glycerol
11 Feb 2018
School
Department
Course
Professor
Document Summary
A family of compounds that are characterized buy their insolubility in water: triglycerides, fats, oils, phospholipids, sterols. Fats have more carbons and hydrogens in proportion to their oxygens than carbohydrates, so they supply more energy: 4 kcal per gram of carbohydrate, 9 kcal per gram of fat. Chief form of fat in the diet. Major storage form of fat in the body. Composed of a molecule of glycerol with three fatty acids attached. Monoglyceride: a molecule of glycerol with one fatty acid attached. Diglyceride: a molecule of glycerol with two fatty acids attached. Can serve as the backbone for a triglyceride. Composed of a carbon chain with hydrogens attached. Has a methyl group at one end (ch3), and an acid group at the other end (cooh) A fatty acid can be saturated or unsaturated. Fatty acids may be 4 to 24 carbons longs (even numbers only) 18-carbon ones are most common in foods and important in nutrition.
