Gold Glyconanoparticles as Water-Soluble Polyvalent Models To Study Carbohydrate Interactions This work was supported by the DGICYT (PB96-0820), J.M.F. thanks the MEC for a predoctoral fellowship. A.G.B. thanks CSIC for financial support. We thank Prof. Martín-Lomas for his scientific and financial support.

Glycosphingolipid clustering and interactions at the cell membrane can be modeled by gold glyconanoparticles prepared with biologically significant oligosaccharides. Such water-soluble gold glyconanoparticles with highly polyvalent carbohydrate displays (see picture, gray hemisphere: gold nanoparticle) have been obtained by a simple and versatile strategy.