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Chapter 7 membranes - Chapter 7 Membrane structure and...

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Chapter 7: Membrane structure and function I. Models of membrane structure A. Overton (1895): membranes must be mostly lipids B. Gorter and Grendel (1925): membranes must be 2 layered, with phospholipids making up the majority of the membrane C. Danielli and Davson (1935): there must be globular layers of proteins surrounding the phospholipid bilayer (on both sides) D. Robertson (1950s): Unit membrane model—there must be proteins stretched thinly over the phospholipid bilayer (on both sides) E. Singer and Nicolson (1972): fluid-mosaic model—the membrane is composed of lipids, proteins (that extend through the phospholipid bilayer), and the phospholipids within the membrane are mobile II. Plasma membrane and the regulation of traffic across the membrane: Work in groups of 2-3 to answer these questions. When you’ve finished (you may need to finish the work on your own), you should be able to identify the major roles of plasma membranes, and you should be familiar with the mechanisms of molecule movement across the plasma membrane (similarities and differences).
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