| Resource | URL | Contents |
|---|---|---|
| NCBI XM sequences (from the non-redundant (NR) database | http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=Protein | Non-redundant protein entries from a variety of sources, including translations from annotated coding regions in GenBank and RefSeq |
| RefSeq | http://www.ncbi.nlm.nih.gov/RefSeq/ | A comprehensive, integrated, non-redundant set of sequences, including genomic DNA, transcript (RNA), and protein products, for major model organisms |
| Ensembl | http://www.ensembl.org/ | Annotated metazoan genomes |
| RIKEN FANTOM cDNA database | http://fantom.gsc.riken.jp/ | Functional annotation of mouse full-length cDNA clones |
| Gene Ontology | http://www.geneontology.org | Genes annotated according to three structured networks of defined terms |