Enzyme distribution
Class 1: Oxido-Reductase:
Catalyses Oxidation ,reduction reactions as:Dehydrogenase ,Oxidase ,Hydroxylase ,Peroxidase.
Usually they require coenzymes as : (NAD+,NADP+,FAD,FMN ).
Class 2:Transferase
Catalyze transfer of functional group between donor & acceptor molecule as methyl , formyl ,carboxyl ,nitrogenous, phosphorus & sulfur containing groups.
Class 3:Hydrolases
Catalyze hydrolytic reaction by adding H2Ocleavage of bond between C & others as : C-O , C-N & C-S.
Class 4 :Lyases
Catalyze non-hydrolytic reaction
Examples: Decarboxylase ,Dehydratase.
Class 5 :Isomerase
Catalyze transfer of groups within a molecule (rearrange).
Class 6:Ligase
Catalyze bond formation coupled to ATP-hydrolysis joining 2 molecules.
