Contains crystal structure information, chemical, and bibliographic data for about 400,000 organic and metal-organic compounds.

The most complete collation of observed molecular and crystallographic symmetry properties to date. A relational database built using Microsoft Access.

Information on the preparation and characterisation of heavy-atom derivatives of protein crystals. Also contains information resulting from an analysis of the binding of these heavy-atoms with proteins in the crystal environment.

assembles and distributes structural information about nucleic acids.

Aims to provide a fully searchable database for the sequences of peptaibols. It deals primarily with naturally-occurring peptides, generally these have a fungal origin.

maintained by the International Centre for Diffraction Data (ICDD)

Archive of experimentally-determined, biological macromolecule 3-D structures from the Brookhaven National Laboratory. Also includes newsletters and a description of the PDB file format.

Structure Determination by Powder Diffraction - Database : methods, tutorials, references and links.