1. Renewable Bioproducts Institute, School of Chemistry & Biochemistry; Georgia Institute of Technology; Atlanta GA 30332 USA
2. Joint Institute for Biological Sciences, Biosciences Division; Oak Ridge National Laboratory; Oak Ridge TN 37831 USA
3. Department of Chemical & Biomolecular Engineering, Department of Forestry, Wildlife & Fisheries; University of Tennessee; Knoxville TN 37996 USA