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Search all biomedical databases provided by the National Center for Biotechnology Information (NCBI), an agency of the U.S. National Library of Medicine at the NIH

An extensive collection of articles about NCBI databases and software. Designed for a novice user, each article presents a general overview of the resource and its design, along with tips for searching and using available analysis tools.

The Nucleotide database is a collection of sequences from several sources, including GenBank, RefSeq, TPA and PDB. Genome, gene and transcript sequence data provide the foundation for biomedical research and discovery.

A portal to gene-specific content based on NCBI's RefSeq project, information from model organism databases, and links to other resources.<br />

The Protein database is a collection of sequences from several sources, including translations from annotated coding regions in GenBank, RefSeq and TPA, as well as records from SwissProt, PIR, PRF, and PDB. Protein sequences are the fundamental determinants of biological structure and …

2025年1月16日 · NCBI Resources Highlighted in 2025 Nucleic Acids Research Database Issue. Jan 13, 2025. The 2025 Nucleic Acids Research Database Issue features papers from NCBI staff on ClinVar, PubChem, GenBank, RefSeq, and more. The citations are available in PubMed with full-text available in PubMed Central (PMC).

NCBI Datasets. A one-stop shop for finding, browsing, and downloading genomic sequences, annotations, and metadata

This site contains the full taxonomy database along with files associating nucleotide and protein sequence records with their taxonomy IDs. See the taxdump_readme.txt and gi_taxid.readme files for more information.

The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences. The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches.