ISPE Glossary of Pharmaceutical and Biotechnology Terminology

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Enzyme Commission (EC) Number

Systematic name and number which identify an enzyme in technical literature. Assigned by the Enzyme Commission, the EC Number consists of four numbers separated by dots: the first classifies the enzyme into one of the six broad groups: 1. Oxidoreductase; 2. Transferases; 3. Hydrolases; 4. Lyases; 5. Isomerases; 6. Ligases. Each group is subdivided into sub-groups, each sub-group into sub-subgroups, and the last number is specific for the enzyme, e.g., EC is deoxyribonuclease I.

Publication Source: Food and Agricultural Organization of the United Nations (FAO)
Publication Date: 1999

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