1. Department of Horticulture and; Plant Physiology/Biochemistry/Molecular Biology Program, University of Kentucky, Lexington, Kentucky 40546 (D.H., S.D.); Division of Glycoscience, School of Biotechnology, Royal Institute of Technology, SE–106 91 Stockholm, Sweden (V.B.); National Renewable Energy Laboratory, BioEnergy Science Center, Golden, Colorado 80401 (S.-Y.D.)