Pääentsyymiluokka
Pääentsyymiluokka is a classification system used in biochemistry to categorize enzymes into broad groups based on the type of reaction they catalyze. This system divides all known enzymes into seven main classes, each designated by a number from 1 to 7. These classes are further subdivided into subclasses, sub-subclasses, and finally individual enzyme entries, identified by a unique four-digit EC number.
The seven main classes of enzymes are: Oxidoreductases (EC 1), Transferases (EC 2), Hydrolases (EC 3), Lyases
The EC number system is maintained by the Nomenclature Committee of the International Union of Biochemistry