Nucleotide Database (NCBI)

The Entrez Nucleotides database is a collection of sequences from several sources, including GenBank, RefSeq, and PDB. The number of bases grows at an exponential rate. As of April 2004, there are over 38,989,342,565 bases. Entrez is the integrated, text-based search and retrieval system used at NCBI for the major databases, including PubMed, Nucleotide and Protein Sequences, Protein Structures, Complete Genomes, Taxonomy, and others.

Publication Details

  • Time-span Current
  • Subscription Type FREE
  • Publisher NCBI National Center for Biotechnology Information. National Library of Medicine. National Institutes of Health
  • Help Guide Access help online
  • Resource Types Statistics and Data