BIOL 1000 Lecture Notes - Lecture 7: Integral Membrane Protein, Lipid Bilayer, Cell Membrane
Document Summary
A membrane may contain hundreds of different proteins. Each membrane proteins has a defined orientation relative to the cytoplasm, so that the properties of a membrane are very different from those of the other surface. In the plasma membrane, those parts of the membrane proteins that interact with the other cells or with extracellular substances project towards outwards into the extracellular space cytoplasmic molecules, project into the cytosol. On the other hands the parts of the membrane proteins that interact with. Membrane proteins can be grouped into classes distinguished by the intimacy of. Integral proteins; their relationship to the lipid bilayer. They are transmembrane proteins, that is that they pass entirely through the lipid bilayer and have domains that protrude from both the extracellular and cytoplasmic side of the membrane. Integral proteins have only one membrane-spanning segment, while other are multispanning. Those portions of an integral membrane protein that reside within the lipid bilayer tend to have a hydrophobic character.
