R GROUP IONIZATION REACTIONS: Group (moiety) Acid Base + H + •carboxyl (C-terminal α-carboxyl or R group of Glu or Asp) (carboxylic acid) (carboxylate anion) + H + R–COOH R–COO – •amino (N-terminal α-amino or ε-amino group of Lys) (ammonium cation) (amine) + H + R–NH 3 + R–NH 2 •thiol of Cys (sulfhydryl) (thiol or sulfhydryl) (thiolate anion)
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This note was uploaded on 02/01/2011 for the course BIOL 273 taught by Professor Norman during the Spring '08 term at Waterloo.