The NCBI taxonomy database serves as a central organizing principle for the Entrez biological databases and provides links to all data for each taxonomic node, from superkingdoms to subspecies. The database is growing at the rate of 2500 new taxa per month and indexes almost 320 000 organisms named at the genus level or lower that are represented in Entrez by at least one nucleotide or protein sequence. The Taxonomy Browser can be used to view the taxonomic position or retrieve data from any of the Entrez databases for a particular organism or group.
