Chapter 7

Chapter 7 - Chapter 7Membrane Functions of Plasma Membrane...

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Chapter 7—Membrane Functions of Plasma Membrane Selectively Permeable Barrier select what’s get into the cell and what comes out of the cell (active barrier). Membrane Associated Proteins Scaffolds or Anchoring holds the structure in place Recognition sites for signaling for hormones and other molecules, highly specialized. Cell to Cell communication. Transport Active or Passive For years the exact structure of the protein was not known, people thought that it was a lipid sandwich (electron microscopy) protein sandwich but, did not know about the proteins and other structures until Scanning Microscopy in which they were able to study the structure more clearly (proteins went through the membrane) and came up with Fluid mosaic model Fig 7-19 Pg 176 Proteins outside of cell-hydrophilic Proteins inside of cell-hydrophobic INTEGRAL PROTEIN Integral monotopic protein one protein that go only half way into PM but do not pass it. Single Pass Protein pass the PM once Multipass Protein single protein that passes the PM more than once Multi subunit Protein multiple polypeptide protein that passes the PM Peripheral Protein just hang outside of the PM FA or isoprenyl anchor protein that is anchored by hanging on to FA chain ( inner surface )
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Chapter 7 - Chapter 7Membrane Functions of Plasma Membrane...

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