EXProt	Sequences of proteins with experimentally verified function
NCBI Protein database	All protein sequences: translated from GenBank and imported from other protein databases
PA-GOSUB	Protein sequences from model organisms, GO assignment and subcellular localization
PIR-PSD	Protein information resource protein sequence database, has been merged into the UniProt knowledgebase
PIR-NREF	PIR’s non-redundant reference protein database
PRF	Protein research foundation database of peptides: sequences, literature and unnatural amino acids
Swiss-Prot	Now UniProt/Swiss-Prot: expertly curated protein sequence database,section of the UniProt knowledgebase
TrEMBL	Now UniProt/TrEMBL: computer-annotated translations of EMBL nucleotide sequence entries: section of the UniProt knowledgebase
UniParc	UniProt archive: a repository of all protein sequences, consisting only of unique identifiers and sequence
UniProt	Universal protein knowledgebase: merged data from Swiss-Prot, TrEMBLand PIR protein sequence databases
UniRef	UniProt non-redundant reference database: clustered sets of related sequences (including splice variants and isoforms)
AA	index Physicochemical properties of amino acids
ProNIT	Thermodynamic data on protein–nucleic acid interactions
ProTherm	Thermodynamic data for wild-type and mutant proteins
TECRdb	Thermodynamics of enzyme-catalyzed reactions
DBSubLoc	Database of protein subcellular localization
NESbase	Nuclear export signals database
NLSdb	Nuclear localization signals
NMPdb	Nuclear matrix associated proteins database
NOPdb	Nucleolar proteome database
PSORTdb	Protein subcellular localization in bacteria
SPD	Secreted protein database
THGS	Transmembrane helices in genome sequences
TMPDB	Experimentally characterized transmembrane topologies
ASC	Active sequence collection: biologically active peptides
Blocks	Alignments of conserved regions in protein families
CSA	Catalytic site atlas: active sites and catalytic residues in enzymes of known  3D structure
COMe	Co-ordination of metals etc.: classification of bioinorganic proteins (metalloproteins and some other complex proteins)
CopS	Comprehensive peptide signature database
eBLOCKS	Highly conserved protein sequence blocks
eMOTIF	Protein sequence motif determination and searches
Metalloprotein Site Database	Metal-binding sites in metalloproteins
PDBSite	3D structure of protein functional sites
PROMISE	Prosthetic centers and metal ions in protein active sites
PROSITE	Biologically significant protein patterns and profiles
ProTeus	Signature sequences at the protein N- and C-termini
ADDA	A database of protein domain classification
CDD	Conserved domain database, includes protein domains fromPfam, SMART,COG and KOG databases
CluSTr	Clusters of Swiss-Prot+TrEMBL proteins
FunShift	Functional divergence between the subfamilies of a protein domain family
Hits	A database of protein domains and motifs
InterPro	Integrated resource of protein families, domains and functional sites
iProClass	Integrated protein classification database
PIRSF	Family/superfamily classification of whole proteins
PRINTS	Hierarchical gene family fingerprints
Pfam	Protein families: multiple sequence alignments and profile hidden Markovmodels of protein domains
PRECISE	Predicted and consensus interaction sites in enzymes
ProDom	Protein domain families
ProtoMap	Hierarchical classification of Swiss-Prot proteins
ProtoNet	Hierarchical clustering of Swiss-Prot proteins
S4	Structure-based sequence alignments of SCOP superfamilies
SBASE	Protein domain sequences and tools
SMART	Simple modular architecture research tool: signalling, extracellular andchromatin-associated protein domains
SUPFAM	Grouping of sequence families into superfamilies
SYSTERS	Systematic re-searching and clustering of proteins
TIGRFAMs	TIGR protein families adapted for functional annotation
AARSDB	Aminoacyl-tRNA synthetase database
ASPD	Artificial selected proteins/peptides database
BacTregulators	Transcriptional regulators of AraC and TetR families
CSDBase	Cold shock domain-containing proteins
CuticleDB	Structural proteins of Arthropod cuticle
DCCP	Database of copper-chelating proteins
GPCRDB	G protein-coupled receptors database
Histone Database	Histone fold sequences and structures
Hox-Pro	Homeobox genes database
HORDE	Human olfactory receptor data exploratorium
KinG—	Kinases in Genomes S/T/Y-specific protein kinases encoded in complete genomes
Knottins	Database of knottins—small proteins with an unusual ‘disulfide throughdisulfide’ knot
LGICdb	Ligand-gated ion channel subunit sequences database
Lipase Engineering Database	Sequence, structure and function of lipases and esterases
LOX-DB	Mammalian, invertebrate, plant and fungal lipoxygenases
MEROPS	Database of proteolytic enzymes (peptidases)
NPD	Nuclear protein database
NUREBASE	Nuclear hormone receptors database
Olfactory Receptor Database	Sequences for olfactory receptor-like molecules
ooTFD	Object-oriented transcription factors database
ProLysED	A database of bacterial protease systems
Prolysis	Proteases and natural and synthetic protease inhibitors
RPG	Ribosomal protein gene database
RTKdb	Receptor tyrosine kinase sequences
Scorpion	Database of scorpion toxins
SDAP	Structural database of allergenic proteins and food allergens
SENTRA	Sensory signal transduction proteins
SEVENS	7-transmembrane helix receptors (G-protein-coupled)
SRPDB	Proteins of the signal recognition particles
TrSDB	Transcription factor database
VKCDB	Voltage-gated potassium channel database