| Keywords | Database Description | Website |
| Taxonomy | ITIS, the Integrated Taxonomic Information System | http://www.itis.gov/ |
| Taxonomy database | http://www.ncbi.nlm.nih.gov/sites/entrez?db=Taxonomy | |
| GRIN Taxonomy for Plants | http://www.ars-grin.gov/cgi-bin/npgs/html/index.pl | |
| Telomere | TelDB (Human Telomere Information database) | http://www.genlink.wustl.edu/teldb/index.html |
| Telomere Database | http://www.fhcrc.org/science/labs/bedalov/telomeredatabase.html | |
| Telomere (List of Telomere Information) | http://www.biophysica.com/telomere.html | |
| Teratogens | Teratogens information | http://www.kumc.edu/gec/support/teratogen.html |
| Teratogen Information System (TERIS) | http://depts.washington.edu/terisweb/teris/ | |
| tmRNA | TMRDB (tmRna Database) | http://www.ag.auburn.edu/mirror/tmRDB/ |
| Topology | Membrane Protein Topology (MPtopo) database | http://blanco.biomol.uci.edu/mptopo/ |
| Toxicogenomics | CTD: The Comparative Toxicogenomics Database | http://ctd.mdibl.org/ |
| Toxicogenomics Database (List) | http://www.hesiglobal.org/Committees/TechnicalCommittees/Genomics/EBI+Toxicogenomics.htm | |
| CEBS: Database of toxicogenomics, microarray and proteomics data | http://cebs.niehs.nih.gov/ | |
| Transcript | BCM Human Transcript Database Home Page | http://www.hgsc.bcm.tmc.edu/HTDB/ |
| Bursal Transcript Database | http://pheasant.gsf.de/DEPARTMENT/DT40/dt40Transcript.html | |
| DPUC Transcripts database | http://www.dpuc.state.ct.us/DPUCTran.nsf?OpenDatabase | |
| NATsDB: Natural Antisense Transcripts DataBase | http://www.pubmedcentral.nih.gov/botrender.fcgi?blobtype=html&pubmedid=17082204 | |
| Experimentally verified orthologous transcription factor binding sites | http://genome.imim.es/datasets/abs2005/ | |
| DBTSS: Database of transcriptional start sites | http://dbtss.hgc.jp/ | |
| Transcription factor | DBD: Transcription factor prediction database | http://www.transcriptionfactor.org/ |
| Transduction | Microbial Signal Transduction Database | http://genomics.ornl.gov/mist/ |
| Sentra is a database of Sensory Signal Transduction Proteins | http://compbio.mcs.anl.gov/sentra/ | |
| tRna | G-tRNA-db: The Genomic tRNA Database | http://lowelab.ucsc.edu/GtRNAdb/ |
| Archaeal tRNA database | http://splits.iab.keio.ac.jp/database.html | |
| tRNA Database interface | http://library.med.utah.edu/RNAmods/trnabase/ | |
| Transgenic | DATABASES; TRANSGENICS (List) | http://www.bioscience.org/urllists/transgen.htm |
| MTDB (Mammalian Transgene Database) | http://tyrosine.biomedcomp.com/4d.acgi$mDispGene?GH1 | |
| Cre transgenic database | http://www.mshri.on.ca/nagy/Cre-works.htm | |
| Transgenic Web Sites (List of colleges) | http://www.med.umich.edu/tamc/links.html | |
| Transporters | Archaeal and bacterial ABC transporters | http://www-abcdb.biotoul.fr/ |
| Transposon | Mouse Transposon Insertion Database | http://mouse.ccgb.umn.edu/transposon/ |
| Transposon Database - Germline SB transposon | http://transposon.abcc.ncifcrf.gov/cgi-bin/germline/list_all.cgi | |
| Tree | Tree Index | http://www.fs.fed.us/database/feis/plants/tree/ |
| Agroforestree Database | http://www.worldagroforestrycentre.org/sites/TreeDBS/aft.asp | |
| UniProtKB/TrEMBL | http://www.ebi.ac.uk/trembl/ | |
| Tribolium castaneum | BeetleBase: Genome database of the beetle Tribolium castaneum | http://www.bioinformatics.ksu.edu/BeetleBase/ |
| Tryptophan | dl-Tryptophan (Dl-tryptophan: Carcinogenic Potency Database) | http://potency.berkeley.edu/chempages/DL-TRYPTOPHAN.html |
| Tumor | The Tumor Gene Family Databases | http://www.tumor-gene.org/tgdf.html |
| Online CGH Tumor Database | http://amba.charite.de/~ksch/cghdatabase/index.htm | |
| Primary Tumor Data Base | http://www.ailab.si/orange/doc/datasets/primary-tumor.htm | |
| Rare Breast Tumor - Breast Cancer Database | http://www.rare-cancer.org/breast-tumor/overview.html | |
| BRAINLIFE - Brain Tumor Medical Database | http://www.brainlife.org/ | |
| Tumor suppressor gene database | http://www.cise.ufl.edu/~yy1/HTML-TSGDB/Homepage.html | |
| ITTACA.(Integrated Tumor Transcriptome Array and Clinical data Analysis) | http://bioinfo-out.curie.fr/ittaca/ | |
| RTKdb (Database of receptor tyrosine kinase) | http://pbil.univ-lyon1.fr/RTKdb/ | |
| Tunicate | DBTGR: A database of tunicate (Ciona) gene regulation | http://dbtgr.hgc.jp/ |
