BIOL 2020 Lecture Notes - Lecture 5: Trans Fat, Carboxylic Acid, Amphiphile
19 Jan 2018
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Document Summary
Lipids: dissolve in organic solvents, do not dissolve in water, ex. Fat stored in adipocyte, nucleus pushed and stored at the side. Fatty acid tail can be found for example on stearic acid. Saturated: all hydrogen bonds are occupied, no double bonds: 3 fatty acids attached to glycerol, carboxyl group that is water soluble and fat insoluble. Steroids: cholesterol can intercalate (go between lipid legs of phospholipids and make membranes more rigid, used as agent inside the lipid cell membranes. Serves as precursor in testosterone and estrogen: also amphipathic. Phospholipids: phospholipids will self orient, polar head groups will face the water and the legs will tuck inside. Proteins: made of same amino acids, but can adopt an infinite amount of confirmations, working molecules of the cell (catalysts as enzymes, do mechanical work, structural importance, r-groups determine the chirality of amino acids. Size varies: amino acids always have the l stereoisomer in proteins.
