Entrez Molecular Sequence Database System  
PubMed Entrez BLAST OMIM Taxonomy Structure




Entrez is a molecular biology database system that provides integrated access to nucleotide and protein sequence data, gene-centered and genomic mapping information, 3D structure data, PubMed MEDLINE, and more. The system is produced by the National Center for Biotechnology Information (NCBI) and is available via the Internet.

Entrez Databases and Retrieval System

Entrez covers over 20 databases including the complete protein sequence data from PIR-International, PRF, Swiss-Prot, and PDB and nucleotide sequence data from GenBank that includes information from EMBL and DDBJ.

The Entrez retrieval system uses an intuitive user interface for rapidly searching sequence and bibliographic data. A unique feature of the system is its use of precomputed similarity searches for each record to create links to "neighbors" or related records in other Entrez databases. These links facilitate integrated access across the various databases. An Entrez global query provides search capability for a subset of Entrez databases at one time. Results may be viewed in various formats inlcuding FlatFile, FASTA, XML, and others. A graphical interface provides easy visualization of complete genomes or chromosomes, as well as biological annotation on individual sequences. Entrez also allows Batch downloads of large search results.

Internet Access to Entrez

Entrez is available via the World Wide Web at http://www.ncbi.nlm.nih.gov/Entrez/.

For Further Information

National Center for Biotechnology Information
8600 Rockville Pike
Building 38A, Room 8N-803
Bethesda, MD 20894
Phone: (301)496-2475
Fax: (301)480-9241
E-mail: info@ncbi.nlm.nih.gov

Revised: February 17, 2004.