Unrestricted Access


Nucleotide is a free collection of genome, gene, and transcript sequence data from several sources, including GenBank, RefSeq, Third Party Annotation (TPA), Protein Databank (PDB), DNA Data Bank of Japan (DDBJ), and European Molecular Biology Laboratory (EMBL). It includes data for thousands of species.

Dates covered

Most current information.

Type of coverage

Nucleotide sequences and reference information.

Vendor/electronic presentation provider

National Center for Biotechnology Information (NCBI)