1. Biotechnology Group, Danish Institute of Agricultural Sciences and Center for Molecular Plant Physiology, DK-1871 Frederiksberg C, Denmark
2. Plant Biochemistry Laboratory, Department of Plant Biology and Center for Molecular Plant Physiology, Royal Veterinary and Agricultural University, DK-1871 Frederiksberg C, Denmark
3. Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824
4. Department of Natural Sciences and Center for Molecular Plant Physiology, Royal Veterinary and Agricultural University, DK-1871 Frederiksberg C, Denmark
5. Forestry and Forest Research Institute, Tsukuba Norin Kenkyu Danchi-nai, Ibaraki 305-8687, Japan
6. Department of Medical Biochemistry and Genetics, University of Copenhagen, DK-2200 Copenhagen N, Denmark