EC-Klassifikation
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Die EC-Nummern (engl. Enzyme Commission numbers) bilden ein numerisches Klassifikationssystem für Enzyme. Jede EC-Nummer besteht aus vier voneinander durch Punkte getrennten Zahlen. Genaugenommen wird nicht das Enzym selbst, sondern die Reaktion die es katalysiert kategorisiert. So kann es vorkommen, dass verschiedene Enzyme, die die gleiche Reaktion katalysieren die gleiche EC-Nummer zugewiesen bekommen.
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1. OXIDOREDUKTASEN
1.1 Acting on the CH-OH group of donors 1.2 Acting on the aldehyde or oxo group of donors 1.3 Acting on the CH-CH group of donors 1.4 Acting on the CH-NH2 group of donors 1.5 Acting on the CH-NH group of donors 1.6 Acting on NADH or NADPH 1.7 Acting on other nitrogenous compounds as donors 1.8 Acting on a sulfur group of donors 1.9 Acting on a heme group of donors 1.10 Acting on diphenols and related substances as donors 1.11 Acting on a peroxide as acceptor 1.12 Acting on hydrogen as donor 1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases) 1.14 Acting on paired donors with incorporation of molecular oxygen 1.15 Acting on superoxide as acceptor 1.16 Oxidizing metal ions 1.17 Acting on CH or CH2 groups 1.18 Acting on iron-sulfur proteins as donors 1.19 Acting on reduced flavodoxin as donor 1.20 Acting on phosphorus or arsenic in donors 1.21 Acting on X-H and Y-H to form an X-Y bond 1.97 Other oxidoreductases
2. TRANSFERASEN
2.1 Transferring one-carbon groups 2.2 Transferring aldehyde or ketone residues 2.3 Acyltransferases 2.4 Glycosyltransferases 2.5 Transferring alkyl or aryl groups, other than methyl groups 2.6 Transferring nitrogenous groups 2.7 Transferring phosphorus-containing groups 2.8 Transferring sulfur-containing groups 2.9 Transferring selenium-containing groups
3. HYDROLASEN
3.1 Acting on ester bonds 3.2 Glycosidases 3.3 Acting on ether bonds 3.4 Acting on peptide bonds (peptidases) 3.5 Acting on carbon-nitrogen bonds, other than peptide bonds 3.6 Acting on acid anhydrides 3.7 Acting on carbon-carbon bonds 3.8 Acting on halide bonds 3.9 Acting on phosphorus-nitrogen bonds 3.10 Acting on sulfur-nitrogen bonds 3.11 Acting on carbon-phosphorus bonds 3.12 Acting on sulfur-sulfur bonds 3.13 Acting on carbon-sulfur bonds
4. LYASEN
4.1 Carbon-carbon lyases 4.2 Carbon-oxygen lyases 4.3 Carbon-nitrogen lyases 4.4 Carbon-sulfur lyases 4.5 Carbon-halide lyases 4.6 Phosphorus-oxygen lyases 4.99 Other lyases
5. ISOMERASEN
5.1 Racemases and epimerases 5.2 cis-trans-Isomerases 5.3 Intramolecular oxidoreductases 5.4 Intramolecular transferases (mutases) 5.5 Intramolecular lyases 5.99 Other isomerases
6. LIGASEN
6.1 Forming carbon-oxygen bonds 6.2 Forming carbon-sulfur bonds 6.3 Forming carbon-nitrogen bonds 6.4 Forming carbon-carbon bonds 6.5 Forming phosphoric ester bonds 6.6 Forming nitrogen-metal bonds
