Twelve - Membrane Structure and Transport

Twelve - Membrane Structure and Transport - Questions How...

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2/29 & 3/2/12 MCB 2000 Lecture 15 Questions • How do cells interact with their environment? – How is matter and energy exchanged? • What are the properties and characteristics of biological membranes that are important for this interaction?
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2/29 & 3/2/12 MCB 2000 Lecture 15 Membrane Composition
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2/29 & 3/2/12 MCB 2000 Lecture 15 Major Component: Phospholipids Phospholipid: Glycerol backbone Fatty acids at position R1 and R2 Polar group at R3
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2/29 & 3/2/12 MCB 2000 Lecture 15 Fatty Acids—Long Hydrocarbon Chains Saturated cis unsaturated fatty acids decrease packing of molecules in membrane . Unsaturated Saturated
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2/29 & 3/2/12 MCB 2000 Lecture 15 Carboxylic acid of fatty acid is esterified to hydroxyl group of glycerol
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2/29 & 3/2/12 MCB 2000 Lecture 15 Phospholipids are amphipathic molecules—they have both hydrophilic and hydrophobic characteristics
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MCB 2000 Lecture 15 Lipid Bilayer is a Favored Structure Membranes form due to the amphipathic property of phospholipids: Polar head group interacts with water. Hydrophobic
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This note was uploaded on 03/19/2012 for the course BIO 2000 taught by Professor Ewr during the Spring '12 term at Alabama.

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Twelve - Membrane Structure and Transport - Questions How...

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