[1] Ohio State Univ, Coll Med, Dept Med Biochem, Columbus, OH 43210 USA
[2] NE Wales Inst, MRIC Biochem Grp, Wrexham, Wales
[3] Univ Wurzburg, Dept Neurol, D-97080 Wurzburg, Germany
[4] Ohio State Univ, Coll Biol Sci, Dept Mol Genet, Columbus, OH 43210 USA
[5] Ohio State Univ, Coll Med, Dept Neurol, Columbus, OH 43210 USA