1. Institute of Molecular Systems Biology, ETH Zurich, 8093 Zurich, Switzerland, Zürich Glycomics Initiative (GlycoInit), ETH Zurich, 8049 Zurich, Switzerland, Institute for Systems Biology, Seattle, Washington 98103, Faculty of Science, University of Zurich, 8057 Zurich, Switzerland, and Competence Center for Systems Physiology and Metabolic Disease, ETH Zurich, 8093 Zurich, Switzerland