The World's largest repository of medical and scientific abstracts, full-text articles, books and reports
Gene sequences and annotations used as references for the study of orthologs structure, expression, and evolution
Protein sequences, 3-D structures, and tools for the study of functional protein domains and active sites
Conserved protein domains
Protein sequences grouped by identity
Sequence similarity-based protein clusters
Functional categorization of proteins by domain architecture
Experimentally-determined biomolecular structures
Genome sequence assemblies, large-scale functional genomics data, and source biological samples
Genome assembly information
Museum, herbaria, and other biorepository collections
Biological projects providing data to NCBI
Descriptions of biological source materials
Genome sequencing projects by organism
DNA and RNA sequences
Sequence-based probes and primers
High-throughput sequence reads
Taxonomic classification and nomenclature
Heritable DNA variations, associations with human pathologies, and clinical diagnostics and treatments
Repository of chemical information, molecular pathways, and tools for bioactivity screening
BLAST is a tool for comparing an amino acid or nucleotide sequence to an entire sequence library, identifying regions of high sequence similarity.
NCBI Minute: Using organism (taxonomic) information with standalone BLAST
Limiting a BLAST search to particular organism or taxonomic group is important for making BLAST searches efficient. This also produces results that are easier to ...
Recent blog posts
You can now download images in both PDF and Scaled Vector Graphics (SVG) formats from our Sequence Viewer and genome browsers such ...Continue reading
October 11, 2019
The new ClinVar The new design for ClinVar pages is now our default view! Thank you for the feedback on the new ...Continue reading
October 9, 2019
Read the recent publication (PMID: 31427293) on the AMRFinder, a tool that identifies antimicrobial resistance (AMR) genes in bacterial genome sequences using ...Continue reading
A New PubMed: Highlights for Information Professionals
In this webinar for librarians and other information professionals Marie Collins from the National Library of Medicine demonstrates the new, modern PubMed. The video's key ...
NCBI Minute: An Insider's Guide to the New My Bibliography
My Bibliography is a central place to save and share your citations. You can add PubMed citations, create them manually, or upload them from citation ...
NCBI Minute: A Beginner's Guide to Genes and Sequences at NCBI
Interested in learning about genes and sequences but don't know how to begin? This webinar, intended for people with limited experience working with sequence information, ...