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EC Tree
1 Oxidoreductases
2 Transferases
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
2.10 Transferring molybdenum- or tungsten-containing groups
3 Hydrolases
4 Lyases
5 Isomerases
5.1 Racemases and epimerases
5.2
cis-trans-
Isomerases
5.3 Intramolecular oxidoreductases
5.3.1 Interconverting aldoses and ketoses, and related compounds
5.3.2 Interconverting keto- and enol-groups
5.3.3 Transposing C=C bonds
5.3.3.1 steroid Δ-isomerase
5.3.3.2 isopentenyl-diphosphate Δ-isomerase
5.3.3.3 vinylacetyl-CoA Δ-isomerase
5.3.3.4 muconolactone Δ-isomerase
5.3.3.5 cholestenol Δ-isomerase
5.3.3.6 methylitaconate Δ-isomerase
5.3.3.7 aconitate Δ-isomerase
5.3.3.8 Δ
3
-Δ
2
-enoyl-CoA isomerase
5.3.3.9 prostaglandin-A
1
Δ-isomerase
5.3.3.10 5-carboxymethyl-2-hydroxymuconate Δ-isomerase
5.3.3.11 isopiperitenone Δ-isomerase
5.3.3.12
L
-dopachrome isomerase
5.3.3.13 polyenoic fatty acid isomerase
5.3.3.14
trans
-2-decenoyl-[acyl-carrier protein] isomerase
5.3.3.15 ascopyrone tautomerase
5.3.3.16 4-oxalomesaconate tautomerase
5.3.3.17
trans
-2,3-dihydro-3-hydroxyanthranilate isomerase
5.3.3.18 2-(1,2-epoxy-1,2-dihydrophenyl)acetyl-CoA isomerase
5.3.3.19 3-[(4
R
)-4-hydroxycyclohexa-1,5-dien-1-yl]-2-oxopropanoate isomerase
5.3.3.20 2-hydroxyisobutanoyl-CoA mutase
5.3.3.21 Δ
3,5
-Δ
2,4
-dienoyl-CoA isomerase
5.3.3.22 lutein isomerase
5.3.3.23
S
-methyl-5-thioribulose 1-phosphate isomerase
5.3.4 Transposing S-S bonds
5.3.99 Other intramolecular oxidoreductases
5.4 Intramolecular transferases
5.5 Intramolecular lyases
5.6 Isomerases altering macromolecular conformation
5.99 Other isomerases
5.99.1 Sole sub-subclass for isomerases that do not belong in the other subclasses
6 Ligases
7 Translocases