1. Contribution from the Alberta Ingenuity Centre for Carbohydrate Science and Department of Chemistry, The University of Alberta, Gunning-Lemieux Chemistry Centre Edmonton, Alberta, T6G 2G2 Canada, Medical Research Council Centre for Immune Regulation, Birmingham Medical School, Birmingham University, Edgbaston, Birmingham, B15 2TT, U.K., and School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.