| Category | Count |
|---|
| Actin binding protein | 21 |
| Activator protein | 28 |
| Adaptor/scaffold | 176 |
| Adenylyl cyclase | 10 |
| Adhesin/agglutinin | 90 |
| Apoptosis | 12 |
| Calcium-binding protein | 47 |
| Cell surface, misc. | 123 |
| Channel, calcium | 38 |
| Channel, cation | 27 |
| Channel, chloride | 4 |
| Channel, misc. | 12 |
| Channel, potassium | 70 |
| Channel, sodium | 20 |
| Chaperone | 15 |
| Chemokine | 30 |
| Contractile protein | 13 |
| Cytokine | 32 |
| Cytoskeletal protein | 99 |
| Cytosolic, misc. | 193 |
| DNA binding protein | 6 |
| Dystrophin complex | 16 |
| Enzyme, misc. | 28 |
| Extracellular matrix | 16 |
| G protein, heterotrimeric | 33 |
| G protein, monomeric (non-Rab) | 62 |
| G protein, Rab | 55 |
| GTPase activating protein, ARF | 19 |
| GTPase activating protein, misc. | 9 |
| GTPase activating protein, Rac/Rho | 14 |
| GTPase activating protein, Ras | 9 |
| GTPase activating protein, RGS | 23 |
| Guanine nucleotide exchange factor, ARF | 8 |
| Guanine nucleotide exchange factor, misc. | 13 |
| Guanine nucleotide exchange factor, Rab | 4 |
| Guanine nucleotide exchange factor, Rac/Rho | 36 |
| Guanine nucleotide exchange factor, Ras | 9 |
| Guanylyl cyclase | 4 |
| Hydrolase, esterase | 12 |
| Hydrolase, non-esterase | 8 |
| Immunoglobulin superfamily | 32 |
| Inhibitor protein | 66 |
| Isomerase | 5 |
| Kinase (non-protein) | 27 |
| Kinase, lipid | 42 |
| Ligand, receptor tyrosine kinase | 8 |
| Lipid binding protein | 32 |
| Lipid modification, protein | 14 |
| Lyase | 2 |
| Motor protein | 13 |
| Myosin binding protein | 20 |
| Nuclear, misc. | 53 |
| Oxidoreductase | 31 |
| Phosphatase | 3 |
| Phosphatase (non-protein) | 52 |
| Phosphatase, lipid | 7 |
| Phosphodiesterase | 24 |
| Phospholipase | 37 |
| Phosphorylase | 3 |
| Protease (non-proteasomal) | 60 |
| Protease (proteasomal subunit) | 40 |
| Protein kinase, dual-specificity | 26 |
| Protein kinase, Ser/Thr | 55 |
| Protein kinase, Ser/Thr (non-receptor) | 273 |
| Protein kinase, tyrosine (non-receptor) | 40 |
| Protein phosphatase, dual-specificity | 39 |
| Protein phosphatase, Ser/Thr | 1 |
| Protein phosphatase, Ser/Thr (non-receptor) | 60 |
| Protein phosphatase, tyrosine (non-receptor) | 24 |
| Receptor, cytokine | 63 |
| Receptor, GPCR | 217 |
| Receptor, guanylyl cyclase | 7 |
| Receptor, ligand-gated channel | 67 |
| Receptor, misc. | 75 |
| Receptor, nuclear (transcription factor) | 24 |
| Receptor, protein phosphatase, tyrosine | 19 |
| Receptor, protein translocating | 2 |
| Receptor, Ser/Thr kinase | 13 |
| Receptor, tyrosine kinase | 56 |
| RNA binding protein | 32 |
| Secreted protein | 135 |
| Transcription factor | 111 |
| Transcription; coactivator/corepressor | 43 |
| Transferase | 11 |
| Translation, protein | 3 |
| Transporter, ABC | 51 |
| Transporter, active | 35 |
| Transporter, facilitator | 191 |
| Ubiquitin conjugating system | 19 |
| Vesicle protein | 75 |
