1. C O OHCH 2 CH 3 H PPOOH H2H2 PO CCCH 2 H2H2 H OO CCOO CC H2H2 H CC H2H2 H OO O CC H2H2 H OO O R R CC H2H2 H POOH OO O

2. Structure of a Bacterial Phospholipid POOH CCCH 2 H2H2 H OO CCOO Phosphate group polar hydrophilic Glycerol Fatty acid tails non polar Hydrophobic Lipid Bilayer structure & Phospholipid modifications Short fatty acid Unsaturate and/or branched fatty acids Long fatty acids Hydrophobic hydrophilic

3. BACTERIA ARCHAEA POOH CCCH 2 H2H2 H OO CCOO CC H2H2 H POOH OO OCCCH 2 H2H2 H OO O CC H2H2 H OO O R R Ester linkage Ether linkage Monolayer (tetra ether linkages)

4. LIPID BILAYER LIPID MONOLAYER