01:694:301 Lecture Notes - Lecture 12: Lipid Bilayer, Oleic Acid, Hydrophile
14 Nov 2018
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Document Summary
Cell membranes and their properties: this chapter represents the structures of several membrane lipids, the boundaries of cells are defined by biological membranes". These barriers prevent molecules generated inside the cell from leaking out and unwanted molecules from diffusing in. All have protein components that act as transport systems (channels and pumps) allowing cells to accept specific molecules and reject others: this property of membranes is known as selective permeability. Eukaryotes unlike prokaryotes also have membrane bounded organelles: you should be generally familiar with the list of membrane properties on (pg. Dependent on temperature (speed); amount of cholesterol, # unsaturated fatty acids. Fatty acids & lipids: hydrophobic properties of membranes is due to their fatty acids, fatty acids are long hydrocarbons chain of various lengths and degrees of unsaturation terminated cooh groups. Some examples: c16 unsaturated fatty acid hexadecanoate (palmitate, c18 unsaturated fatty acid octadecanoate (stearate, c18 saturated fatty acid cis 9 octadecanoate (oleate)
