| ASD | Allosteric Database |
| DEPOD | DEPhOsphorylation Database - a manually curated database harboring human phosphatases, their experimentally verified protein and non-protein substrates |
| ExplorEnz | Enzyme Database |
| BRENDA | Enzyme Information System |
| Enzyme Nomenclature |
| Enzyme Nomenclature database |
| EC2PDB | Enzyme Structures Database |
| EKPD | Eukaryotic protein kinase and protein phosphatase database |
| FunTree | Evolution of enzyme function within domain super families |
| Industrial enzymes |
| IntEnz | Integrated relational Enzyme database |
| KKB | Kinase Knowledgebase |
| M-CSA | Mechanism and Catalytic Site Atlas - database of enzyme reaction mechanisms |
| Nomenclature of Multiple Forms of Enzymes (isozymes) |
| MEROPS | Peptidase database |
| PeroxiBase | Plant Peroxidase Database |
| REBASE | Restriction Enzyme Database |
| Restriction Enzymes Resource |
| Symbolism and Terminology in Enzyme Kinetics |
| eQuilibrator | Thermodynamics calculator for biochemical reactions |
| Thermodynamics of Enzyme-Catalyzed Reactions |
