BIO 1140 Chapter Notes - Chapter 5: Peripheral Membrane Protein, Membrane Transport, Passive Transport
16 Aug 2016
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There are integral and peripheral membrane proteins: transport. Due to the hydrophobic qualities of most membranes, hydrophilic substances cannot travel through the membrane on their own. Proteins on membrane can create a hydrophilic channel that allows specific compounds to move in or out of the cell. (protein would have to change shape depending on direction: enzyme activity. Many enzymes are membrane proteins, like those of the etc: signal transduction. Receptor proteins are found on membrane which bind to hormones or other chemicals. Once bound, the receptors trigger changes on the inside surface of the membrane which signals through the rest of the cell: attachment/recognition. Cytoskeleton attaches to proteins which are exposed to the internal and external cell. 5. 3b integral membrane proteins interact with the membrane hydrophobic core. Integral membrane proteins: proteins that are found embedded into the phospholipid bilayer. If they are embedded all along the membrane then they are called transmembrane proteins.
