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EC Number given by the IUBMB (International Union of Biochemistry and Molecular Biology), classes of enzymes und subclasses defined according to the reaction catalyzed

An EC Number is composed of four numbers divided by a dot. For example the alcohol dehydrogenase has the EC Number
show all Carboxy-Lyases (EC No. begins with 4.1.1.)
Use the ECTree to browse and search EC Numbers