MBB 222 Study Guide - Final Guide: Thioether, Aliphatic Compound, Phenyl Group
18 Dec 2016
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Mbb222 exam vocab definitions: amino acid classification and irregular/disordered. U8-01 load hydrophobic side chain functional groups. The side chains of alanine, valine, leucine and isoleucine tend to cluster together within proteins, stabilizing protein structure by hydrophobic interactions. Glycine has the simplest structure (side chain is just one hydrogen) Despite being easily grouped with nonpolar amino acids, its very small side chain makes no real contribution to hydrophobic interactions. Hydrocarbons can be either aromatic or aliphatic: Aliphatic refers to nonaromatic hydrocarbon compounds where the constituent carbon atoms can be straight-chain, branched chain or cyclic. Proline has an aliphatic side chain with a distinctive cyclic structure. The secondary amino (imino) group of proline residues is held in a rigid conformation that reduces the structural flexibility of polypeptide regions containing proline. Methionine contains sulfur and has a slightly nonpolar thioether group in its side chain. One of 2 amino acids that contain sulfur.
