ENZYME - Enzyme nomenclature database Enzyme Nomenclature (Nomenclature Committee of the IUBMB) ExplorEnz - The Enzyme Database IntEnz - Integrated relational Enzyme Database MEROPS- The Peptidase Database Thermodynamics of Enzyme-Catalyzed Reactions Handbook of Enzymes CAZy - Carbohydrate-Active enZYmes MACiE - Mechanism, Annotation and Classification in Enzymes