BIOCH200 Study Guide - Final Guide: Branched-Chain Amino Acid, Disulfide, Aromatic Acid
23 Sep 2018
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Non-aromatic (they can be cyclic, but only aromatic compound can contain an stable ring of atoms, ex. benzene) Hydrophobic interactions (important in establishing, maintaining 3-d structures of protein, since their tendency is to cluster away from h2o) Highly hydrophobic than alanine, and share biosynthesis and degradation pathway. Branched chain amino acids, since their side chains of c atoms contain branches. Contain non-polar methyl thioether group in its side chain and makes it one of more hydrophobic. Special role in synthesis protein b/c it is almost always the 1st aa is growing polypeptide chain. Structure of it resembles that of ala with a h atoms replaced by a sulfhydryl group (-sh) Though side chain of cys is somewhat hydrophobic, also highly reactive, b/c. S atom is polarizable the -sh group of cys can form weak h-bonds with o and n. -sh group residues in proteins can be a weak acid which allows it to lose its.
