Biology 2382B Study Guide - Cell Membrane, Phospholipid, Glycerol
23 Mar 2014
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Document Summary
Allow specialized cellular functions to occur in a localized manner. Refers to the fact that the head group is attached via a phosphate group. Due to amphipathicity, phospholipids spontaneously form bilayers in aqueous solution. Amphipathic; orient themselves with their polar hydroxyl groups facing the same direction as the polar head group of the fatty acid. Dependent on plasma membrane that it s in. i. e. certain diameter, move at certain speed. Cholesterol can change diameter sometimes; cell specific and can increase fluidity. Functionality of the fatty acid chain based on: chain length, chain composition, head group composition. Amino alcohol + fatty acyl (amide bond) Not linked through phosphate i. e. not a phospholipid: fluidity. Fluorescently label proteins; bleach area and see if fluorescence recovers. %recovery tells you the mobility of the proteins. Protein mobility is a reflection on membrane mobility: closed compartments. Carbohydrates found exclusively on the exoplasmic face (or lumen of er)
