1. Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, Canada, N1G 2W1
2. Institute for Biological Sciences, National Research Council, Ottawa, ON, Canada, K1A 0R6
3. Centre for Carbohydrate Chemistry, School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, NR4 7TJ, U.K.
4. Centre for Carbohydrate Chemistry, School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K.
5. Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, U.K.