Biology 2382B Lecture Notes - Lecture 13: Dystrophin, Atp Hydrolysis, Ribosomal Rna
24 Apr 2017
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Document Summary
Structure, composition and properties of biological membranes: fatty acid properties and melting point, 4 properties of biomembranes, fluid, closed compartment, semi-permeable, asymmetric. Insertion of membrane proteins: types i, ii, iii, iv, tail anchored and gpi. Allow specialized functions to occur in a localized manner. Due to amphipathicity, phospholipids spontaneously form lipid bilayers in aqueous solution where properties of the fatty acids confer properties onto the bilayers. Biomembranes: found around cells: have different components, lipids, sterols and proteins. Membrane has a lot of proteins in it. Biomembrane is different than the phospholipid bilayer formed in vitro experimentally. Phospholipids: carbon tails are hydrophobic, polar heads are hydrophilic. Amphipathic: form structures to get the hydrophoblic tail away from the aqueous environment: hide the tail. Cell is a large liposome with a plasma membrane all around it that is made of amphipathic molecules: pms have many proteins in them.
