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E classification

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E classification

(Science: biochemistry) classification of enzymes based on the recommendations of the Committee on enzyme nomenclature of the international union of biochemistry.

The first number indicates the broad type of enzyme (1 = oxidoreductase, 2 = transferase, 3 = hydrolase, 4 = lyase, 5 = isomerase, 6 = ligase (synthetase)).

The second and third numbers indicate subsidiary groupings and the last number, which is unique, is assigned arbitrarily in numerical order by the Committee.