307
Table 1 (continued)
Class
Subclass
sub-subclass
Reaction type
EC
1.20
Acting on phosphorus or arsenic in donors
EC
1.21
Acting on X–H and Y–H to form an X–Y bond
EC
1.22
Acting on halogen in donors
EC
1.97
Other oxidoreductases
EC 2: Transferases
EC 2.1
Transferring one-carbon groups
EC 2.1.1 Methyltransferases
EC 2.1.2 Hydroxymethyl-, formyl- and related transferases
EC 2.1.3 Carboxyl- and carbamoyltransferases
EC 2.1.4 Amidinotransferases
EC 2.2
Transferring aldehyde or ketonic groups
EC 2.2.1 a single subclass containing the transaldolases
EC 2.3
Acyltransferases
EC 2.3.1 Acyltransferases
EC 2.3.2 Aminoacyltransferases
EC 2.4
Glycosyltransferases
EC 2.4.1 Hexosyltransferases
EC 2.4.2 Pentosyltransferases
EC 2.4.99 Transferring other glycosyl groups
EC 2.5
Transferring alkyl or aryl groups, other than methyl groups
EC 2.5.1 A single subclass that includes a rather mixed group of such
enzymes
EC 2.6
Transferring nitrogenous groups
EC 2.6.1 Transaminases (aminotransferases)
EC 2.6.3 Oximinotransferases
EC 2.6.99 Transferring other nitrogenous groups
EC 2.7
Transferring phosphorus-containing groups
EC 2.7.1 Phosphotransferases with an alcohol group as acceptor
EC 2.7.2; Phosphotransferases with a carboxyl group as acceptor
EC 2.7.3 Phosphotransferases with a nitrogenous group as acceptor
EC 2.7.4 Phosphotransferases with a phosphate group as acceptor
EC 2.7.6 Diphosphotransferases
EC 2.7.7 Nucleotidyltransferases
EC 2.7.8 Transferases for other substituted phosphate groups
EC 2.7.9 Phosphotransferases with paired acceptors
EC 2.8
Transferring sulfur-containing groups
EC 2.8.1 Sulfurtransferases
EC 2.8.2 Sulfotransferases
(continued)
Proteins as Enzymes