Contents: (Adv. Sci. 2/2017)

In article number 1600394, Almira Kurbangalieva, Katsunori Tanaka, and co-workers at the RIKEN Biofunctional Synthetic Chemistry Laboratory develop a way to engineer glycan complexes— heterogeneous clusters of sugar chains attached to proteins or lipids—in a way that allows the molecules to be transported preferentially to specific organs of the body through pattern recognition mechanisms, depending on the sugar chains contained in the cluster.