Table 1.
NCBI databases (as of 21 August 2023)
| Database | Records | Description |
|---|---|---|
| Literature | ||
| PubMed | 36 100 644 | scientific and medical abstracts/citations |
| PubMed Central | 9 268 952 | full-text journal articles |
| NLM Catalog | 1 634 653 | index of NLM collections |
| Bookshelf | 983 634 | books and reports |
| MeSH | 353 699 | ontology used for PubMed indexing |
| DNA/RNA | ||
| Nucleotide | 605 293 217 | DNA and RNA sequences from GenBank and RefSeq |
| BioSample | 34 796 756 | descriptions of biological source materials |
| SRA | 28 858 671 | high-throughput DNA/RNA sequence read archive |
| Taxonomy | 2 653 432 | taxonomic classification and nomenclature catalog |
| Assembly | 1 782 091 | genome assembly information |
| BioProject | 712 423 | biological projects providing data to NCBI |
| Genome | 79 671 | genome sequencing projects by organism |
| BioCollections | 8497 | museum, herbaria, and biorepository collections |
| Genes | ||
| GEO Profiles | 128 414 055 | gene expression and molecular abundance profiles |
| Gene | 47 059 151 | collected information about gene loci |
| GEO DataSets | 6 874 686 | functional genomics studies |
| PopSet | 404 340 | sequence sets from phylogenetic/population studies |
| HomoloGene | 141 268 | homologous gene sets for selected organisms |
| Proteins | ||
| Protein | 1 194 803 871 | protein sequences from GenBank and RefSeq |
| Identical Protein Groups | 629 076 260 | protein sequences grouped by identity |
| Protein Clusters | 1 137 329 | sequence similarity-based protein clusters |
| Structure | 208 741 | experimentally-determined biomolecular structures |
| Protein Family Models | 166 131 | conserved domain architectures, HMMs, and BlastRules |
| Conserved Domains | 64 234 | conserved protein domains |
| Chemicals | ||
| PubChem Substance | 307 634 967 | deposited substance and chemical information |
| PubChem Compound | 115 669 131 | chemical information with structures, information, and links |
| PubChem BioAssay | 1 626 630 | bioactivity screening studies |
| PubChem Pathways | 240 671 | molecular pathways with links to genes, proteins and chemicals |
| Clinical Genetics | ||
| dbSNP | 1 121 739 543 | short genetic variations |
| dbVar | 7 749 330 | genome structural variation studies |
| ClinVar | 2 339 222 | human variations of clinical significance |
| ClinicalTrials.gov | 463 200 | registry of clinical studies |
| MedGen | 216 373 | medical genetics literature and links |
| GTR | 81 209 | genetic testing registry |
| dbGaP | 1406 | genotype/phenotype interaction studies |