This data base contains the three-dimensional structures of Lectins that have been crystallized without or their carbohydrate ligands and non-carbohydrate ligands. Links are available to access the information about the original article (Medline), the protein sequence and related structural information (Swissprot, PDB), taxonomy and glycan array data when available. See Guide for information about the Data Base content, the Data Query, the Simple Search and the Advanced search options. The "Display and Download Menu" requires the Jmol applet to be installed.