The Enzyme Commission number (EC number) is a numerical classification scheme for enzymes, based on the chemical reactions they catalyze. [1] As a system of enzyme nomenclature, every EC number is associated with a recommended name for the corresponding enzyme-catalyzed reaction. EC numbers do not specify enzymes but enzyme-catalyzed reactions.

It is primarily based on the recommendations of the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology (IUBMB) and it describes each type of characterized enzyme for which an EC (Enzyme Commission) number has been provided [More details / …

EC编号 或 EC号 是 酶学委员会 （Enzyme Commission）为 酶 所制作的一套编号分类法，是以每种酶所 催化 的 化学反应 为分类基础。 这套分类法亦同时会为各种酶给予一个建议的名称，所以亦称为 酶学委员会命名法 。

2024年6月25日 · The EC classification groups enzymes that perform the same or related enzymatic functions. You can use the EC browser to explore enzymes that have similar functions, shape of enzyme and/or arrangements of amino acids performing the enzyme reaction.

class. The third number, the sub-subclass, further specifies the type of reaction involved. For instance, EC 1.x.1.- indicates that NAD+ or NADP+ is the acceptor, while 1.x.2.- has a cytochrome as the acceptor, etc. The fourth is a serial number that is used to identify the individual enzyme within a sub-subclass.

The IUBMB enzyme classification system, available at the IUBMB ExplorEnz website, uses a four-component number (the EC number) that identifies an enzyme in terms of reaction catalysed. There were originally six recognized groups of enzymes: Oxidoreductases (EC 1), Transferases (EC 2), Hydrolases (EC …

Each enzyme is assigned a four-digit number, preceded by the prefix EC—for enzyme classification—that indicates its group, subgroup, and so forth. This is demonstrated in Table 19.3.2 19.3. 2 for alcohol dehydrogenase. Dehydrogenases catalyze oxidation-reduction reactions involving hydrogen.

2021年9月9日 · The EC number classification code provides very specific information about the type of reaction, mechanism, substrates, products, and cofactors. This prevents any confusion that could potentially result from using only the common names of enzymes. Here’s what an EC number indicates:

Six enzyme classes have been recognized since the first Enzyme classification and nomenclature list was first approved by the International Union of Biochemistry in 1961. These were based on the type of reaction catalysed: Oxidoreductases (EC 1), Transferases (EC 2), Hydrolases (EC 3), Lyases (EC 4), Isomerases (EC 5) and Ligases (EC 6).

2023年6月10日 · 1. Enzyme Commission (EC) Number Classification. The Enzyme Commission (EC) Number classification is widely used and provides a systematic way to categorize enzymes based on the type of reaction they catalyze. The EC number consists of four digits separated by periods, representing different levels of classification.