Biology 1002B Lecture Notes - Lecture 7: Lipid Bilayer, Hydrophile, Atp-Binding Cassette Transporter
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Document Summary
Membranes are not completely lipids; there are those that are 50% proteins. The foundation of the membrane is the lipid bilayer. Lipid molecules contain hydrophilic and hydrophobic groups within the single molecule. The part of the lipid that interacts with the aqueous environment is the polar hydrophilic molecule, enabling it to interact with the environment. The internal part, the fatty acid part, of a lipid is hydrophobic. Based on the tendency of hydrophobic groups to condense together, the force is a low energy state and is spontaneous. Amphipathic: molecules that is both polar and non-polar. They can solubilise lipid molecules and hydrophilic molecules. The top is a saturated fatty acid; saturated with hydrogens and the molecule is linear. The second shows an introduction of double bonds. Lose two hydrogens for every c=c bond, making the compound unsaturated. Cis imparts a kink in the fatty acid tail, making it not linear.
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