BIOCHEM 2EE3 Lecture Notes - Lecture 8: Peripheral Membrane Protein, Liposome, Micelle
6 Mar 2014
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Biochemistry 2ee3 lecture 8: not all of these are biological lipids though. Lipids soluble in organic solvents, but not in water: not all lipids are bio-molecules, but we are only discussing biological lipids. Lipids are not connected to each other by bonds, but rather by hydrophobic interactions. These hydrophobic interactions are very strong, and hold membranes, etc. together. Fat is more easily stacked than oil because further away and is unsaturated: polar head has central phosphate atoms and x. Three components: polar head is glycerol group, x is variable, r is variable: amphiphilic has polar, non-polar characteristics, blue is hydrophilic, yellow is hydrophobic. Lung has large surface area, when breathing out, alveoli would collapse without surfactant. The lings do not collapse because the hydrophobic parts are exposed, when they approach each other, they repel each other: non-polar tails exposed to air, sphingosine is hydrophilic, not glycerophospholipid. Lipid bilayer is a way to trap water inside membranes.
