The GlycoSuite database (GlycoSuiteDB) is an annotated and curated relational database of glycan structures and is a product of Tyrian Diagnostics Ltd (formerly Proteome Systems Ltd). Currently, the database contains most published O-linked glycans, and N-linked glycans in the literature from the years 1990-2005. For each structure, information is available concerning the glycan type, linkage and anomeric configuration, mass and composition. Detailed information is provided on native and recombinant sources, including tissue and/or cell type, cell line, strain and disease state. Where known, the proteins to which the glycan structures are attached are described, and cross-references to Swiss-Prot/TrEMBL are given if applicable. The database annotations include literature references which are linked to PubMed, and detailed information on the methods used to determine each glycan structure are noted to assess the quality of the structural assignment.