Membrane Structure - Chapter 11 I. Background II. Lipid Bilayer A. Classes of Lipids 1.phospholipids a. phosphatidylcholine 2. sphingolipids 3. sterols 4. glycolipids B. Amphipathic C. Lipid bilayer 1. shape a. liposome D. Properties 1. self-sealing 2. barrier 3. stability E. Two-dimensional Fluid F. Contributors to fluidity 1. tail length 2. double bonds 3. changed 4. cholesterol G. Asymmetrical 1.leaflets a. cytosolic b. extracellular 2. enzymatic lipid flip-flop a. flippases b. flopases c. scramblases III. Membrane Proteins A. Background B. Membrane association 1. itegral 2. peripheral 3. proteolipid C. Membrane spanning structure 1. alpha helix a. passages 2. beta barrel D. Solubilization 1. detergents a. mycells E. Reinforcement by the Cell Cortex a. spectrin F. Movement of membrane proteins G. Carbohydrate layer 1. glycoproteins a. oligosaccharides b. proteoglycans 2. functions 1) lectins