In addition to maintaining the GenBank(R) nucleic acid sequence database, the National
Center for Biotechnology Information (NCBI) provides data analysis and retrieval and
resources that operate on the data in GenBank and a variety of other biological data
made available through NCBI's Web site. NCBI data retrieval resources include Entrez,
PubMed, LocusLink and the Taxonomy Browser. Data analysis resources include BLAST,
Electronic PCR, OrfFinder, RefSeq, UniGene, Database of Single Nucleotide Polymorphisms
(dbSNP), Human Genome Sequencing pages, GeneMap'99, Davis Human-Mouse Homology Map,
Cancer Chromosome Aberration Project (CCAP) pages, Entrez Genomes, Clusters of Orthologous
Groups (COGs) database, Retroviral Genotyping Tools, Cancer Genome Anatomy Project
(CGAP) pages, SAGEmap, Online Mendelian Inheritance in Man (OMIM) and the Molecular
Modeling Database (MMDB). Augmenting many of the Web applications are custom implementations
of the BLAST program optimized to search specialized data sets. All of the resources
can be accessed through the NCBI home page at: http://www.ncbi.nlm.nih. gov