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EC Tree

1 Oxidoreductases

2.1 Transferring one-carbon groups

2.2 Transferring aldehyde or ketonic groups

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

2.9.1 Selenotransferases

2.10 Transferring molybdenum- or tungsten-containing groups

5.1 Racemases and epimerases

5.2 cis-trans-Isomerases

5.3 Intramolecular oxidoreductases

5.4 Intramolecular transferases

5.5 Intramolecular lyases

5.6 Isomerases altering macromolecular conformation

5.99 Other isomerases

6.1 Forming carbon-oxygen bonds

6.2 Forming carbon-sulfur bonds

6.3 Forming carbon-nitrogen bonds

6.4 Forming carbon-carbon bonds

6.4.1 Ligases that form carbon-carbon bonds (only sub-subclass identified to date)

6.5 Forming phosphoric-ester bonds

6.5.1 Ligases that form phosphoric-ester bonds (only sub-subclass identified to date)

6.6 Forming nitrogen—metal bonds

6.7 Forming nitrogen-nitrogen bonds

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Release 2023.1 (January 2023)