BCM 475 Chapter Notes - Chapter 12: Methylene Group, Choline, Phospholipid
Document Summary
Prevent leaking/entering of unwanted molecules: lipid components form barrier of permeability and protein components form pumps/channels. Fuel molecules, energy stores, signal molecules/messengers, components of membranes. Hydrophobic lipids are essential to their ability to form membranes (thanks to fatty acids) Fatty acids long hydrocarbon chains of various lengths and degrees of unsaturation terminated with carboxylic acid groups. 18:0 denotes c18 fatty acid with no double bonds; 18:2 would have 2 double bonds. Begin numbering at carboxyl end: carbon 2 = | carbon 3 = | last carbon at end = . Position of double bond = : ex. Cis- 9 means there is cis double bond between carbon atoms 9 and 10: trans- 2 means a trans double bond between carbon 2 and 3. Count from distal end ( -carbon is number 1: -3 has a double bond at the third c from the -end (between 3 and 4)
