Heavy-atom Databank - Cambridge

Biological Macromolecule Crystallization Database (BMCD) - The NASA Archive for Protein Crystal Growth Data

Cambridge database of Protein Alignments organised as Structural SuperfamiliesProtein Data Bank (PDB) - An international repository for the processing and distribution of 3-D macromolecular structure data primarily determined experimentally.

ExPASy - SWISS-PROT and TrEMBL - annotated protein sequence database

Peptaibol Database (Birkbeck College) - A fully searchable database for the sequences of naturally occurring peptaibols.

Homologous Structure Alignment Database - Cambridge

NIH search form for PDB query - allows to ask for molecule visualisation in browser readable form

Nucleic Acid Database (NDB) - Biomolecular Resource

X-Ray WWW Server - The COREX Database of atomic and molecular core edge excitation oscillator strengths

Structural Classification of Proteins (SCOP)Inorganic Crystal Structure Database (ICSD) - contains complete structural information for inorganic compounds, including compound name, molecular formula, crystal symmetry group, unit cell parameters, atomic coordinates, and temperature factors.

ExPASy - Enzyme Nomenclature Database - A repository of information relative to the nomenclature of enzymes. It is primarily based on the recommendations of the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology (IUBMB) and it describes each type of characterized enzyme for which an EC (Enzyme Commission) number has been provided

Pauling File - Inorganic Materials Database and Design System - The Pauling File covers all non-organic ordered solid state materials and consists of structure, diffraction, constitution (phase diagram) and physical property data.