Cytoplasmic Membrane (Plasma Membrane)

The cytoplasmic membrane is a 40–80 A ˚ -thick semipermeable membrane that contains a phospholipid bilayer with proteins embedded within the bilayer (fluid mosaic model) (Fig. 1.3). The phospholipid bilayer is made of hydrophobic fatty acids oriented towards the inside of the bilayer and hydrophilic glycerol moieties oriented towards the outside of the bilayer. Cations such as