Lecture 4 - 4. Membranes Iain McKinnell Dept Biology...

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4. Membranes Iain McKinnell Dept Biology
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Biological Membranes Surround all cells and organelles About 8 nm thick Selectively permeable -regulates passage of molecules Provides a location for many cellular reactions
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Phospholipid Bilayers Fig. 5-4, p. 97
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Fluid Mosaic Model Fig. 5-1, p. 94
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Fluid Mosaic Model is Supported by Experimental Evidence Fig. 5-2, p. 95 ?
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Membrane Asymmetry Fig. 5-3, p. 96
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Maintaining Proper Fluidity membrane composition Fig. 5-5, p. 97
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Adjusting Fatty Acid Composition - Desaturases Fig. 5-6, p. 99
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Sterols Fig. 5-7, p. 99
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Fluid Mosaic Model Fig. 5-1, p. 94
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Membrane Protein Structure Integral membrane proteins
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Peripheral Membrane Proteins On surface of membrane Do not interact with hydrophobic core Held together by noncovalent bonds Most on cytoplasmic side of membrane Made up of mixture of polar and nonpolar amino acids
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Functions of Membrane Proteins
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This note was uploaded on 10/20/2011 for the course BIOL 1103 taught by Professor Mckinnel during the Fall '11 term at Carleton CA.

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Lecture 4 - 4. Membranes Iain McKinnell Dept Biology...

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