泽充王大学 上 Shanghai Jiao Tong University 3.5.1 Chemical Composition of Membranes 圈Phospholipid bilayer-磷酯双分子层 ·8 nm thick Occurs in Bacteria and Eukarya,not in Archeae. 0 Structure:Glycerol backbone attached with fatty acids and phosphate-containing groups by ester linkage结构：甘油骨架，以酯键连接脂肪酸与磷酸， 11 H2C-O- R 0 HC-O-C-R 0 H2C-O- Light area= Dark area glycerol portion of region of fatty acids a phospholipid (hydrophilic) (hydrophobic)
Shanghai Jiao Tong University 3.5.1 Chemical Composition of Membranes Phospholipid bilayer-磷酯双分子层 • 8nm thick • Occurs in Bacteria and Eukarya, not in Archeae. • Structure: Glycerol backbone attached with fatty acids and phosphate-containing groups by ester linkage 结构: 甘油骨架, 以酯键连接脂肪酸与磷酸
Figure 3.4 Glycerol H C-O-C-H HgC C-O-C-H HgC 0 H-C-O-P-O- Fatty acids H 0 Phosphate CH2 Ethanolamine CH2 (a) +NH3 Hydrophilic region Fatty acids Hydrophobic 《 region Hydrophilic region (b) Glycerophosphates Fatty acids (c) 2012 Pearson Education,Inc
Figure 3.4 Fatty acids Glycerol Phosphate Ethanolamine Fatty acids Glycerophosphates Hydrophilic region region region Hydrophobic Hydrophilic Fatty acids © 2012 Pearson Education, Inc
Hydrophilic region Fatty enlarged schematic view acids of a single unit Hydrophobic region membrane. Glycerol Phosphate electron micrograph of photosynthetic membrane stacks derived from the cytoplamic membrane in a phototrophic bacterium The cytoplasmic membrane. JouueM 0
enlarged schematic view of a single unit membrane. electron micrograph of photosynthetic membrane stacks derived from the cytoplamic membrane in a phototrophic bacterium The cytoplasmic membrane