NCBI Databases
Literature
The World's largest repository of medical and scientific abstracts, full-text articles, books and reports
Bookshelf
Books and reports
MeSH
Ontology used for PubMed indexing
NLM Catalog
Books, journals and more in the NLM Collections
PubMed
Scientific and medical abstracts/citations
PubMed Central
Full-text journal articles
Genes
Gene sequences and annotations used as references for the study of orthologs structure, expression, and evolution
Gene
Collected information about gene loci
GEO DataSets
Functional genomics studies
GEO Profiles
Gene expression and molecular abundance profiles
HomoloGene
Homologous genes sets for selected organisms
PopSet
Sequence sets from phylogenetic and population studies
UniGene
Clusters of expressed transcripts
Genetics
Heritable DNA variations, associations with human pathologies, and clinical diagnostics and treatments
Proteins
Protein sequences, 3-D structures, and tools for the study of functional protein domains and active sites
Conserved Domains
Conserved protein domains
Identical Protein Groups
Protein sequences grouped by identity
Protein
Protein sequences
Protein Clusters
Sequence similarity-based protein clusters
Sparcle
Functional categorization of proteins by domain architecture
Structure
Experimentally-determined biomolecular structures
Genomes
Genome sequence assemblies, large-scale functional genomics data, and source biological samples
Assembly
Genome assembly information
BioCollections
Museum, herbaria, and other biorepository collections
BioProject
Biological projects providing data to NCBI
BioSample
Descriptions of biological source materials
Genome
Genome sequencing projects by organism
Nucleotide
DNA and RNA sequences
Probe
Sequence-based probes and primers
SRA
High-throughput sequence reads
Taxonomy
Taxonomic classification and nomenclature
Chemicals
Repository of chemical information, molecular pathways, and tools for bioactivity screening
BioSystems
Molecular pathways with links to genes, proteins and chemicals
PubChem BioAssay
Bioactivity screening studies
PubChem Compound
Chemical information with structures, information and links
PubChem Substance
Deposited substance and chemical information
BLAST
Basic Local Alignment Search Tool
BLAST is a tool for comparing an amino acid or nucleotide sequence to an entire sequence library, identifying regions of high sequence similarity.
- blastn
- Nucletide BLAST
- blastx
- Translated nucleotide vs protein database
- Primer-BLAST
- Design primers specific to your PCR template
- blastp
- Protein BLAST
- tblastn
- Protein vs translated nucleotide database
- SmartBLAST
- Find proteins highly similar to your query
Video tutorial
Introducing a New Web BLAST Results Page
NCBI is testing a new web BLAST results page format and we want your feedback. This video highlights new features and the layout of the ...
Recent blog posts
April 18, 2019
Proposed changes to AGP files for genome assemblies
If you are a consumer or producer of AGP (A Golden Path) files for genome assemblies, please read on. We’d like your ...
Continue readingApril 17, 2019
Recent enhancements to BLAST+ (2.9.0): built-in taxonomy and access to proteins from the Pathogen Detection Project
We have made some recent improvements to the BLAST+ applications that take full advantage of the version 5 BLAST databases (BLASTDBv5), which ...
Continue readingApril 15, 2019
NCBI on YouTube: Request access to controlled data in dbGaP
Do you need access to controlled data in the database of Genotypes and Phenotypes (dbGaP)? This short video will show you how ...
Continue readingRecent videos
Clone FTP Files: Content and Uses for Genome Assemblies
This is a minor update to the video of the same name that was published in January 2017. Learn how to use clone FTP files ...
Introducing a New Web BLAST Results Page
NCBI is testing a new web BLAST results page format and we want your feedback. This video highlights new features and the layout of the ...
MANE- A New Collaboration Between NCBI and EMBL-EBI
Presented December 12, 2018. Learn about the MANE (Matched Annotation from the NCBI and EBI) collaboration, a joint initiative of the NCBI RefSeq and EMBL-EBI ...