Naturally occurring lipids can be divided essentially in two groups: (1) phospholipids containing glycerophosphate as the anchor group for fatty acids, and (2) lipids containing backbones other than glycerol. Phospholipids may be further subdivided into nitrogen-containing lipids, such as phosphatidylcholine (PC), -ethanolamine (PE), -serine (PS), and plasmalogens, and nitrogen-lacking lipids, such as phosphatidic acid (PA), […]
The membrane-water interface comprises the lipid head-group proper, with tightly bound hydration water and a more loosely packed extended hydration layer; the glyc-erol backbone; and the ester linkages of the fatty acyl chains. Due to conformational constraints, the carbonyl group of the sn-2 chain is particularly close to the lipid-water interface, while that of the […]