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| bind to specific molecules or ions to temporarily allow them to cross the membrane |
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| integral proteins that allow specific molecules and ions to pass through the membrane by creating a pore |
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| Transmit information into the cell |
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are usually glycoproteins with the carbohydrate portion projecting out of the cell and into the extracellular space. These give the cell a biochemical personality and are important in cell-to-cell recognition. |
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| 6 General Categories of membrane proteins |
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| Transporters, Enzymes, Cell-surface receptors, cell-surface identity markers, cell-to-cell adhesion proteins, attachments to cytoskeleton |
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A transmembrane domain is a hydrophobic region of a transmembrane protein that anchors it in the membrane. Often composed of α-helices, but sometimes utilizing β-pleated sheets to form a barrel-shaped spore. |
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| A difference in concentration of a substance from one location to another, often across a membrane |
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| The net movement of dissolved molecules or other particles from a region where they are more concentrated to a region where they are less concentrated. |
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| Condition in which a membrane is permeable to some substances but not to tohers. |
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| posses a hydrated interior that spans membrane |
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