BIOL 2020 Lecture 13: BIOC 2300 - Lecture 13
22 Feb 2019
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Bioc 2300 lecture 13 february 6, 2019 lipids and membranes. Lipids are heterogeneous, hydrophobic (or amphipathic), and thus insoluble. Lipids associate into larger structures and are not usually free in solution (due to hydrophobic effect: due to potential to aggregate, lipid storage and transport is a challenge. Otherwise, they are structurally heterogeneous and can take a wide range of shapes and functions. There is a hydrophobic effect to cause the lipids to assemble together. The formation of clathrate is not entropically favorable. Lipids also form larger structures but they do not polymerize. Fatty acids (fa: aliphatic carboxylic acids: these are use largely as precursor for other lipids (tag) and used as energy. Phospholipids (pls: phosphor-head group attached to diacylglycerol or ceramide: are derivatives of fatty acids. Two acyl chain and a polar head group. Isoprenoids/steroids (e. g. cholesterol: generally hormone and used for the structure of the membrane as well. Glycolipids (glycosphingolipids: carbohydrate is bound onto a lipid.
