And very stable o c p c tail water figure 8 5

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Unformatted text preview: gh to accommodate changes in cell shape, but its hydrocarbon interior remains intact, as an oily layer between two aqueous compartments. and very stable O C P C tail water Figure 8-5 Simulation of a lipid bilayer. In this model of a dipalmitoyl phosphatidylcholine bilayer, C atoms are gray (except for the terminal carbon of each lipid tail, which is yellow), ester O atoms are red, phosphate groups are green, + 21 Lipid Bilayer ! Formed from glycerophospholipids and sphingolipids !  Has to do with geometry of molecules !  Cholesterol can partition in membrane, but cannot form bilayer of itself ! Fatty acids and triglycerides cannot form bilayers !  Geometry wrong + 22 Lipid Bilayer ! 25-30 Å thick ! Thickness varies depending on length of acyl chains and how they interact ! Also depends on size of head groups + Membrane Fluidity ! Lipid !  T melting point (Tm) of transition from ordered crystalline state to fluid state !  Acyl chains pack together in crystalline form !  van de...
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This document was uploaded on 02/02/2014.

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