Structure of Cell Membranes Fluid mosaic model Mixed composition: –Phospholipid bilayer –Glycolipids –Sterols –Proteins

Fig. 3-6, p.42 fluid one layer of lipids lipid bilayer two “tails” one layer of lipids “head” phospholipidlipid bilayer

Fig. 3-6b, p.42 one layer of lipids Phospholipids

Fig. 3-6c, p.42 fluid lipid bilayer Phospholipids

Membrane Proteins Adhesion proteins Communication proteins Receptor proteins Recognition proteins Passive transporters Active transporters

Fig. 3-7, p Membrane Proteins

The membrane is a fluid mosaic of phospholipids and proteins –A membrane is a fluid mosaic With proteins and other molecules embedded in a phospholipid bilayer Figure 5.12 Fibers of the extracellular matrix Carbohydrate (of glycoprotein) Glycoprotein Microfilaments of cytoskeleton Phospholipid Cholesterol Proteins Plasma membrane Glycolipid Cytoplasm

Fig. 3-7a, p.42 adhesion proteins communication proteins Membrane Proteins

Fig. 3-7b, p.43 receptor proteins recognition proteins passive transporters Membrane Proteins

Fig. 3-7c, p.43 active transporters plasma membrane Membrane Proteins