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Nucleic Acids Research Advance Access published online on October 23, 2009
Nucleic Acids Research, doi:10.1093/nar/gkp886
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© The Author(s) 2009. Published by Oxford University Press.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Database Issue

Chemical Entities of Biological Interest: an update

Paula de Matos*, Rafael Alcántara, Adriano Dekker, Marcus Ennis, Janna Hastings, Kenneth Haug, Inmaculada Spiteri, Steve Turner and Christoph Steinbeck

Chemoinformatics and Metabolism Team, European Bioinformatics Institute, Hinxton, Cambridge CB10 1SD, UK

*To whom correspondence should be addressed. Tel: +44 1223 494444; Fax: +44 1223 494468; Email: pmatos{at}ebi.ac.uk

Received September 11, 2009. Accepted October 2, 2009.

Chemical Entities of Biological Interest (ChEBI) is a freely available dictionary of molecular entities focused on ‘small’ chemical compounds. The molecular entities in question are either natural products or synthetic products used to intervene in the processes of living organisms. Genome-encoded macromolecules (nucleic acids, proteins and peptides derived from proteins by cleavage) are not as a rule included in ChEBI. In addition to molecular entities, ChEBI contains groups (parts of molecular entities) and classes of entities. ChEBI includes an ontological classification, whereby the relationships between molecular entities or classes of entities and their parents and/or children are specified. ChEBI is available online at http://www.ebi.ac.uk/chebi/. This article reports on new features in ChEBI since the last NAR report in 2007, including substructure and similarity searching, a submission tool for authoring of ChEBI datasets by the community and a 30-fold increase in the number of chemical structures stored in ChEBI.


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