| A | B |
|---|
| Properties of Lipid Bilayer Hydrophobic core acts as | permeability barrier |
| Properties of Lipid Bilayer Hydrophobic and van der Waals interactions | stabilize bilayers |
| Lipid bilayers | spontaneously seal |
| Membrane Composition | Lipids, Proteins, Carbohydrates |
| Lipids | Fatty acid—Triglyceride—Phosphoglyceride |
| Lipid molecules rotate and move | laterally |
| Fluidity | ~rate of movement of lipid molecules |
| Lipid Composition | Affects Membranes |
| Desaturases | enzymes that desaturate single carbon-carbon bonds |
| Phospholipases and acyltransferases— | “reshuffle” and transfer unsaturated fatty acids |
| Leaflets of Bilayer are | Asymmetric |
| Organization of Lipids is | Not Random |
| Lipid rafts | areas of reduced fluidity |
| Membrane Proteins | Integral proteins, Peripheral proteins, Lipid-anchored proteins |
| Integral Proteins | Possess at least one trans-membrane domain |
| Parts of integral protein on outside or inside of | membrane are usually globular and hydrophilic |
