1. Medical Research Council Dunn Human Nutrition Unit, Wellcome Trust/MRC Building, Hills Road, Cambridge, CB2 2XY, United Kingdom, Department of Biochemistry, Université Laval, Québec, Canada, G1K 7P4, Department of Biochemistry and Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, Departments of Microbiology and Immunology and Biochemistry and Molecular Biology, University of British Columbia, Canada, V6T 1Z3, and Division of Biology,...