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Chemistry search engine that aggregates and indexes chemical structures and their associated information into a single searchable repository.
Integrated search and retrieval system, including PubMed, nucleotide and protein sequences, protein structures, complete genomes, taxonomy, and others.
National Center for Biotechnology Information
Provides access to multiple databases in biomedical and genomic information.
Contains supplier information for over 8 million unique chemicals. eMolecules obtains chemical data by searching the Internet, and receiving submissions from data providers such as chemical suppliers.
Enzyme Structures Database
Known enzyme structures deposited in the Protein Data Bank (PDB)
NIH genetic sequence database of all publicly available DNA sequences.
KEGG LIGAND Database
Contains chemical substances and reactions that are relevant to biological systems. It is a composite database consisting of COMPOUND, GLYCAN, REACTION, RPAIR, and ENZYME databases.
National Center for Biotechnology Information (NCBI)
NCBI's major databases, including PubMed, Nucleotide and Protein Sequences, Protein Structures, Complete Genomes, Taxonomy, and others.
Organizes information on genomes including sequences, maps, chromosomes, assemblies, and annotations.
Molecular Modeling Database (MMDB) containing 3D macromolecular structures, including proteins and polynucleotides.
Protein Data Bank (PDB)
Repository for 3-D biological macromolecular structure data. The PDB archive contains information about experimentally-determined structures of proteins, nucleic acids, and complex assemblies.
Contains non-redundant, standardized and validated chemical structures extracted from deposited substances in PubChem Substance. A PubChem Compound record will link to more than one PubChem Substance record if different depositors supplied the same structure.
Contains chemical structures, synonyms, registration IDs, description, related urls, database cross-reference links to PubMed, protein 3D structures, and biological screening results. PubChem Substance records contain substance information electronically submitted to PubChem by depositors.