All UniProtKB/Swiss-Prot entries corresponding to class 4.2.1.-.
The following ENZYME entries belong to class 4.2.1.-:
4.2.1.1 Carbonate dehydratase. 4.2.1.2 Fumarate hydratase. 4.2.1.3 Aconitate hydratase. 4.2.1.4 Citrate dehydratase. 4.2.1.5 Arabinonate dehydratase. 4.2.1.6 Galactonate dehydratase. 4.2.1.7 Altronate dehydratase. 4.2.1.8 Mannonate dehydratase. 4.2.1.9 Dihydroxy-acid dehydratase. 4.2.1.10 3-dehydroquinate dehydratase. 4.2.1.11 Phosphopyruvate hydratase. 4.2.1.12 Phosphogluconate dehydratase. 4.2.1.13 Transferred entry: 4.3.1.17. 4.2.1.14 Transferred entry: 4.3.1.18. 4.2.1.15 Transferred entry: 4.4.1.1. 4.2.1.16 Transferred entry: 4.3.1.19. 4.2.1.17 Enoyl-CoA hydratase. 4.2.1.18 Methylglutaconyl-CoA hydratase. 4.2.1.19 Imidazoleglycerol-phosphate dehydratase. 4.2.1.20 Tryptophan synthase. 4.2.1.21 Transferred entry: 4.2.1.22. 4.2.1.22 Cystathionine beta-synthase. 4.2.1.23 Deleted entry. 4.2.1.24 Porphobilinogen synthase. 4.2.1.25 L-arabinonate dehydratase. 4.2.1.26 Transferred entry: 4.3.1.9. 4.2.1.27 Acetylenecarboxylate hydratase. 4.2.1.28 Propanediol dehydratase. 4.2.1.29 Transferred entry: 4.99.1.6. 4.2.1.30 Glycerol dehydratase. 4.2.1.31 Maleate hydratase. 4.2.1.32 L(+)-tartrate dehydratase. 4.2.1.33 3-isopropylmalate dehydratase. 4.2.1.34 (S)-2-methylmalate dehydratase. 4.2.1.35 (R)-2-methylmalate dehydratase. 4.2.1.36 Homoaconitate hydratase. 4.2.1.37 Transferred entry: 3.3.2.4. 4.2.1.38 Transferred entry: 4.3.1.20. 4.2.1.39 Gluconate dehydratase. 4.2.1.40 Glucarate dehydratase. 4.2.1.41 5-dehydro-4-deoxyglucarate dehydratase. 4.2.1.42 Galactarate dehydratase. 4.2.1.43 2-dehydro-3-deoxy-L-arabinonate dehydratase. 4.2.1.44 Myo-inosose-2 dehydratase. 4.2.1.45 CDP-glucose 4,6-dehydratase. 4.2.1.46 dTDP-glucose 4,6-dehydratase. 4.2.1.47 GDP-mannose 4,6-dehydratase. 4.2.1.48 D-glutamate cyclase. 4.2.1.49 Urocanate hydratase. 4.2.1.50 Pyrazolylalanine synthase. 4.2.1.51 Prephenate dehydratase. 4.2.1.52 Transferred entry: 4.3.3.7. 4.2.1.53 Oleate hydratase. 4.2.1.54 Lactoyl-CoA dehydratase. 4.2.1.55 3-hydroxybutyryl-CoA dehydratase. 4.2.1.56 Itaconyl-CoA hydratase. 4.2.1.57 Isohexenylglutaconyl-CoA hydratase. 4.2.1.58 Transferred entry: 4.2.1.59. 4.2.1.59 3-hydroxyacyl-[acyl-carrier-protein] dehydratase. 4.2.1.60 Transferred entry: 4.2.1.59. 4.2.1.61 Transferred entry: 4.2.1.59. 4.2.1.62 5-alpha-hydroxysteroid dehydratase. 4.2.1.63 Transferred entry: 3.3.2.9 and 3.3.2.10. 4.2.1.64 Transferred entry: 3.3.2.9 and 3.3.2.10. 4.2.1.65 3-cyanoalanine hydratase. 4.2.1.66 Cyanide hydratase. 4.2.1.67 D-fuconate dehydratase. 4.2.1.68 L-fuconate dehydratase. 4.2.1.69 Cyanamide hydratase. 4.2.1.70 Pseudouridylate synthase. 4.2.1.71 Transferred entry: 4.2.1.27. 4.2.1.72 Transferred entry: 4.1.1.78. 4.2.1.73 Protoaphin-aglucone dehydratase (cyclizing). 4.2.1.74 Long-chain-enoyl-CoA hydratase. 4.2.1.75 Uroporphyrinogen-III synthase. 4.2.1.76 UDP-glucose 4,6-dehydratase. 4.2.1.77 Trans-L-3-hydroxyproline dehydratase. 4.2.1.78 (S)-norcoclaurine synthase. 4.2.1.79 2-methylcitrate dehydratase. 4.2.1.80 2-oxopent-4-enoate hydratase. 4.2.1.81 D(-)-tartrate dehydratase. 4.2.1.82 Xylonate dehydratase. 4.2.1.83 4-oxalmesaconate hydratase. 4.2.1.84 Nitrile hydratase. 4.2.1.85 Dimethylmaleate hydratase. 4.2.1.86 Transferred entry: 4.2.1.98. 4.2.1.87 Octopamine dehydratase. 4.2.1.88 (R)-synephrine. 4.2.1.89 Carnitine dehydratase. 4.2.1.90 L-rhamnonate dehydratase. 4.2.1.91 Arogenate dehydratase. 4.2.1.92 Hydroperoxide dehydratase. 4.2.1.93 ATP-dependent NAD(P)H-hydrate dehydratase. 4.2.1.94 Scytalone dehydratase. 4.2.1.95 Kievitone hydratase. 4.2.1.96 4a-hydroxytetrahydrobiopterin dehydratase. 4.2.1.97 Phaseollidin hydratase. 4.2.1.98 16-alpha-hydroxyprogesterone dehydratase. 4.2.1.99 2-methylisocitrate dehydratase. 4.2.1.100 Cyclohexa-1,5-dienecarbonyl-CoA hydratase. 4.2.1.101 Trans-feruloyl-CoA hydratase. 4.2.1.102 Transferred entry: 4.2.1.100. 4.2.1.103 Cyclohexyl-isocyanide hydratase. 4.2.1.104 Cyanase. 4.2.1.105 2-hydroxyisoflavanone dehydratase. 4.2.1.106 Bile-acid 7-alpha-dehydratase. 4.2.1.107 3-alpha,7-alpha,12-alpha-trihydroxy-5-beta-cholest-24-enoyl-CoA hydratase. 4.2.1.108 Ectoine synthase. 4.2.1.109 Methylthioribulose 1-phosphate dehydratase. 4.2.1.110 Aldos-2-ulose dehydratase. 4.2.1.111 1,5-anhydro-D-fructose dehydratase. 4.2.1.112 Acetylene hydratase. 4.2.1.113 o-succinylbenzoate synthase. 4.2.1.114 Methanogen homoaconitase. 4.2.1.115 UDP-N-acetylglucosamine 4,6-dehydratase (inverting). 4.2.1.116 3-hydroxypropionyl-CoA dehydratase. 4.2.1.117 2-methylcitrate dehydratase (2-methyl-trans-aconitate forming). 4.2.1.118 3-dehydroshikimate dehydratase. 4.2.1.119 Enoyl-CoA hydratase 2. 4.2.1.120 4-hydroxybutanoyl-CoA dehydratase. 4.2.1.121 Colneleate synthase. 4.2.1.122 Tryptophan synthase (indole-salvaging). 4.2.1.123 Tetrahymanol synthase. 4.2.1.124 Arabidiol synthase. 4.2.1.125 Dammarenediol II synthase. 4.2.1.126 N-acetylmuramic acid 6-phosphate etherase. 4.2.1.127 Linalool dehydratase. 4.2.1.128 Lupan-3-beta,20-diol synthase. 4.2.1.129 Squalene--hopanol cyclase. 4.2.1.130 D-lactate dehydratase. 4.2.1.131 Carotenoid 1,2-hydratase. 4.2.1.132 2-hydroxyhexa-2,4-dienoate hydratase. 4.2.1.133 Copal-8-ol diphosphate hydratase. 4.2.1.134 Very-long-chain (3R)-3-hydroxyacyl-[acyl-carrier protein] dehydratase. 4.2.1.135 UDP-N-acetylglucosamine 4,6-dehydratase (configuration-retaining). 4.2.1.136 ADP-dependent NAD(P)H-hydrate dehydratase. 4.2.1.137 Sporulenol synthase. 4.2.1.n1 Transferred entry: 4.2.1.126. 4.2.1.n2 Transferred entry: 4.2.1.134.