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1 Oxidoreductases
2 Transferases
2.1 Transferring one-carbon groups
2.2 Transferring aldehyde or ketonic groups
2.3 Acyltransferases
2.4 Glycosyltransferases
2.4.1 Hexosyltransferases
2.4.2 Pentosyltransferases
2.4.3 Sialyltransferases
2.4.99 Transferring other glycosyl groups
2.4.99.1 β-galactoside α-(2,6)-sialyltransferase
2.4.99.2 β-
D
-galactosyl-(1→3)-
N
-acetyl-β-
D
-galactosaminide α-2,3-sialyltransferase
2.4.99.3 α-
N
-acetylgalactosaminide α-2,6-sialyltransferase
2.4.99.4 β-galactoside α-2,3-sialyltransferase
2.4.99.5 galactosyldiacylglycerol α-2,3-sialyltransferase
2.4.99.6
N
-acetyllactosaminide α-2,3-sialyltransferase
2.4.99.7 α-
N
-acetylneuraminyl-2,3-β-galactosyl-1,3-
N
-acetylgalactosaminide 6-α-sialyltransferase
2.4.99.8 α-
N
-acetylneuraminate α-2,8-sialyltransferase
2.4.99.9 lactosylceramide α-2,3-sialyltransferase
2.4.99.10 neolactotetraosylceramide α-2,3-sialyltransferase
2.4.99.11 lactosylceramide α-2,6-
N
-sialyltransferase
2.4.99.12 lipid IV
A
3-deoxy-
D
-
manno
-octulosonic acid transferase
2.4.99.13 (Kdo)-lipid IV
A
3-deoxy-
D
-
manno
-octulosonic acid transferase
2.4.99.14 (Kdo)
2
-lipid IV
A
(2-8) 3-deoxy-
D
-
manno
-octulosonic acid transferase
2.4.99.15 (Kdo)
3
-lipid IV
A
(2-4) 3-deoxy-
D
-
manno
-octulosonic acid transferase
2.4.99.16 starch synthase (maltosyl-transferring)
2.4.99.17
S
-adenosylmethionine:tRNA ribosyltransferase-isomerase
2.4.99.18 dolichyl-diphosphooligosaccharide—protein glycotransferase
2.4.99.19 undecaprenyl-diphosphooligosaccharide—protein glycotransferase
2.4.99.20 2′-phospho-ADP-ribosyl cyclase/2′-phospho-cyclic-ADP-ribose transferase
2.4.99.21 dolichyl-phosphooligosaccharide-protein glycotransferase
2.4.99.22
N
-acetylglucosaminide α-(2,6)-sialyltransferase
2.4.99.23 lipopolysaccharide heptosyltransferase I
2.4.99.24 lipopolysaccharide heptosyltransferase II
2.4.99.25 lipopolysaccharide heptosyltransferase III
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
3 Hydrolases
4 Lyases
5 Isomerases
6 Ligases
6.1 Forming carbon-oxygen bonds
6.2 Forming carbon-sulfur bonds
6.2.1 Acid-thiol ligases
6.2.2 Amide---thiol ligases
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
6.6 Forming nitrogenmetal bonds
6.7 Forming nitrogen-nitrogen bonds
7 Translocases