ch 7membrane - Ch 7 Membranes and Membrane transport 1. The...

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Ch 7 Membranes and Membrane transport 1. The cell membrane is a fluid mosaic of lipids and proteins. a. Alternate models i. Davson Danielli sandwich model b. Current model i. Fluid Mosaic 1. Amphipathic proteins embedded in a phospholipid bilayer c. Membrane fluidity i. Units move laterally within the membrane if not anchored to the cytoskeleton ii. Unsaturated tails of lipids keep membrane fluid at lower temperatures iii. Cholesterol also helps to maintain fluidity d. Membrane Protein functions i. Integral proteins embedded in lipid bilayer ii. Peripheral proteins attached at surfaces iii. Protein functions include 1. transport 2. enzymatic activity 3. signal transduction 4. cell to cell recognition a. Glycoproteins 5. intracellular joining 6. attachment to cytoskeleton and ECM e. Synthesis and membrane sides. i. Inside and outside differ in composition ii. Materials synthesized on the inside of the ER and Golgi are usually found on the outside of the cell. 2.
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This note was uploaded on 10/19/2011 for the course BIOL 230 taught by Professor Case,c during the Spring '08 term at Skyline College.

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ch 7membrane - Ch 7 Membranes and Membrane transport 1. The...

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