1. London Research and Development Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street, London, Ontario N5V 4T3, Canada
2. Department of Chemistry, University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 3K7, Canada
3. Pacific Forestry Centre, Canadian Forest Service, Natural Resources Canada, Victoria, British Columbia V8Z 1M5, Canada
4. McMaster University, 1290 Main St. W, Hamilton, Ontario L8S 4L8, Canada
5. Department of Biochemistry, University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 3K7, Canada