enzyme

• Oxidoreductases - Oxidation-reductions
• Transferases - Functional group transfer reactions
• Hydrolases - Hydrolysis reactions
• Lyases - Reactions involving addition or removal of groups from double bonds
• Isomerases - Isomeration reactions
• Ligases - Reactions involving bond formations coupled with ATP hydrolysis
• under oxidoreductase

  Oxidases - Oxidation of substrate ➢ ↓H atoms, ↑O atoms
• under oxidoreductase

  Reductases - Reduction of substrate ➢ ↓O atoms,↑H atom
• under oxidoreductases

  Dehydrogenases - Removal of 2 H atoms from substrate introduces a double bond to the product, H atoms being accepted by coenzyme
• under transferase

  Transaminases - Transferanaminogroup betweensubstrates
• under transferase

  Kinase - Transfer of phosphate group between substrates
• under hydrolases

  Lipase - Hydrolysis of ester linkages in lipids
• under hydrolases

  proteases - Hydrolysis of amide linkages in proteins
• under hydrolases

  Nucleases - Hydrolysis of sugar-phosphate ester bonds in nucleic acids
• under hydrolases

  Carbohydrases - Hydrolysis of glycosidic bonds in carbohydrate
• under hydrolases

  Phosphatases - Hydrolysis of phosphate-ester bonds
• under lyases

  Dehydratases - Removal of H2O from substrate

  Decarboxylases - Removal of CO2 from substrate

  Deaminases - Removal of NH3 from substrate

  Hydratases - Addition of H2O to substrate
• under isomerase

  Racemases - Conversion of D to L isomer or vice versa

  Mutases - Transfer of one functional group from one position to another in the same molecule
• under ligases

  Synthetases - Formation of new bond between 2 substrates with participation of ATP

  Carboxylases - Formation of new bond between substrate and CO2 with participation of ATP