1. Sustainable Biofuels and Co-Products Research Unit, Eastern Regional Research Center, USDA-ARS, Wyndmoor, Pennsylvania 19038, United States
2. Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
3. Department of Biology, University of Virginia, Charlottesville, Virginia 22904, United States
4. Air Products and Chemicals, Inc., Allentown, Pennsylvania 18106, United States