320Fall09Homework2 - and measured using the FRAP technique...

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Cell Biology (BIO 320), Fall 2009, Dr. Bushart Homework set #2 1. Lipid rafts are thicker than other regions of the membrane. Describe the fatty acid tails of the phospholipids that would make up a lipid raft (as compared to “regular” phospholipids). Would you expect the lipids within the raft to have more or less lateral mobility than the lipids in the other parts of the membrane? Explain your choice. 2. Why would liposomes have a minimum size? 3. Would you expect the lateral mobility of phospholipids to exhibit a corral effect? Why or why not? 4. Would you expect glycophorin to show a low or high rate of recovery if it was tagged
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Unformatted text preview: and measured using the FRAP technique? Explain your reasoning behind your choice. 5. If we have an aqueous mixture of membrane lipids and proteins in the presence of detergents explain at the level of molecular interactions why we might only have to remove said detergent to form protein-containing liposomes? 6. Consider two different proteins in a plasma membrane. They can both diffuse throughout the same regions of the plasma membrane, yet protein A has a much slower rate of movement than does protein B. What is one of the possible explanations for this difference (there are at least three possible explanations)?...
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