May 18, 2015 · Welcome to NCBI The National Center for Biotechnology Information advances science and health by providing access to biomedical and genomic information.

With this update, the email feature will also require My NCBI login, and PubMed emails will only be sent to the email address associated with the My NCBI account.

The NCBI is located in Bethesda, Maryland, and was founded in 1988 through legislation sponsored by US Congressman Claude Pepper. The NCBI houses a series of databases …

Jul 21, 2025 · The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences. The program compares nucleotide or protein sequences to sequence …

NCBI's Genome resources include information on large-scale genomics projects, genome sequences and assemblies, and mapped annotations, such as variations, markers and data …

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 …

Optimize for Highly similar sequences (megablast) Optimize for More dissimilar sequences (discontiguous megablast) Optimize for Somewhat similar sequences (blastn) Choose a …