Databases             Spartan Molecular Database (SMD)             Each Spartan'06 license includes a new, Wavefunction developed, database of more than 150,000 molecules. Each entry has been pre-calculated using conformational analysis (molecular mechanics) and structure optimization at up to 8 Quantum Chemical Models. The included database contains approximately 600,000 unique structures along with energy, aqueous solvation energy, and a number of molecular and atomic properties.           Protein Data Bank             The Protein Data Bank (PDB) is maintained by the non-profit Research Consortium for Structural Bioinformatics (RCSB) and is maintained through the Department of Chemistry at Rutgers University. The PDB is a fabulous resource for biological macromolecules. While Wavefunction software, with its strong roots in quantum mechanics, tends to focus on small molecules (drug-size and smaller), the PDB provides an excellent source of information on small molecule interaction with large molecules. Beginning with the release of Trident and Spartan'06 for Windows, Wavefunction software can query the Protein Data Bank via PDB ID query (provided your machine is on-line) and can seamlessly retrieve Protein Data Bank files for visualization and analysis. For more information, visit PDB.           Cambridge Crystallographic Data Center (CCDC)             Wavefunction's Spartan software (for Windows, Linux, and Unix) can interface and query the Cambridge Structural Database. The CSD is the world's repository for small molecule crystal data and includes more than 350,000 published crystal structures. This is an excellent resource for comparing calculated structures with those from X-ray crystallography and neutron diffraction experiments. For more information on the CSD, contact the Cambridge Crystallographic Data Centre.