Functions of Membrane Proteins

Functions of Membrane Proteins - Attachment of the...

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Functions of Membrane Proteins Enzymes Some enzymes are embedded within membranes. Cell Identification Markers Lipids and proteins within the membrane may have a carbohydrate chain attached. These glycolipids and glycoproteins often function as cell identification markers, allowing cells to identify other cells. This is particularly important in the immune system where cells patrolling the body's tissues identify and destroy foreign invaders such as bacteria or viruses. Cell Adhesion - Junctions Proteins associated with the cell membranes of animal cells may bind to proteins of adjacent cells. These connections, called junctions may serve to bind cells together, to prevent the movement of material between the cells, or to allow cells to communicate with each other.
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Unformatted text preview: Attachment of the Cytoskeleton Receptors Receptors enable cells to detect hormones and a variety of other chemicals in their environment. The binding of a molecule and a receptor initiates a chemical change within the cell. In the diagram above, the binding of hormone and receptor initiates the conversion of chemical A to chemical B. Hormones are molecules that cells use to communicate with one another. For example, cells in the pancreas produce the hormone insulin when glucose levels in the blood become elevated. The hormone travels within the blood to other parts of the body. It stimulates liver and muscle cells to begin removing the glucose and storing it as glycogen....
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Functions of Membrane Proteins - Attachment of the...

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