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Unformatted text preview: Therefore, a lipid bilayer membrane will always seal itself into a closed vesicle so that there are no free edges. b) The carbon chain length of the fatty acid component of phospholipids can range from short (14 CH2-) to relatively long (22 CH2-). Short chain fatty acids tend to increase the fluidity of a membrane, whereas long chain fatty acids tend to decrease the fluidity. Long chain FAs stack together more readily and tend to increase the liquid crystal nature of lipids in solution. c) The fatty acids can vary in their degree and pattern of saturation. Phospholipids with unsaturated fatty acid chains (one or more double bonds) interfere with tight packing of the lipids and thus tend to make the membrane more fluid. Saturated FAs have the opposite effect....
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- Summer '08