bookmark MetalPDB Collects information related to metal sites in biological macromolecules. MetalPDB starts from the structural information contained in the Protein Data Bank (PDB) with the aim of providing an access to an overview of metal-containing biological structures. Searches can be made by keywords, metal, sequence, or PDB List. The database includes panels that give access to a direct downloading, links towards tools dedicated to metal analysis, and various statistics. The repository is updated monthly in an automated manner.