4.2.1.1 carbonic anhydrase - 4.2.1.10 3-dehydroquinate dehydratase - 4.2.1.100 cyclohexa-1,5-dienecarbonyl-CoA hydratase - 4.2.1.101 trans-feruloyl-CoA hydratase transferred to EC 4.1.2.61 4.2.1.102 cyclohexa-1,5-dienecarbonyl-CoA hydratase transferred to EC 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 7alpha-dehydratase - 4.2.1.107 3alpha,7alpha,12alpha-trihydroxy-5beta-cholest-24-enoyl-CoA hydratase - 4.2.1.108 ectoine synthase - 4.2.1.109 methylthioribulose 1-phosphate dehydratase - 4.2.1.11 phosphopyruvate hydratase - 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 (configuration-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 - 4.2.1.12 phosphogluconate dehydratase - 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-3beta,20-diol synthase - 4.2.1.129 squalene-hopanol cyclase - 4.2.1.13 L-serine dehydratase transferred to EC 4.3.1.17 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-CoA 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 - 4.2.1.138 (+)-caryolan-1-ol synthase - 4.2.1.139 pterocarpan synthase - 4.2.1.14 D-serine dehydratase transferred to EC 4.3.1.18 4.2.1.140 gluconate/galactonate dehydratase - 4.2.1.141 2-dehydro-3-deoxy-D-arabinonate dehydratase - 4.2.1.142 5'-oxoaverantin cyclase - 4.2.1.143 versicolorin B synthase - 4.2.1.144 3-amino-5-hydroxybenzoate synthase - 4.2.1.145 capreomycidine synthase - 4.2.1.146 L-galactonate dehydratase - 4.2.1.147 5,6,7,8-tetrahydromethanopterin hydro-lyase - 4.2.1.148 2-methylfumaryl-CoA hydratase - 4.2.1.149 crotonobetainyl-CoA hydratase - 4.2.1.15 homoserine dehydratase deleted, included in EC 4.4.1.1 4.2.1.150 short-chain-enoyl-CoA hydratase - 4.2.1.151 chorismate dehydratase - 4.2.1.152 hydroperoxy icosatetraenoate dehydratase - 4.2.1.153 3-methylfumaryl-CoA hydratase - 4.2.1.154 tetracenomycin F2 cyclase - 4.2.1.155 (methylthio)acryloyl-CoA hydratase - 4.2.1.156 L-talarate dehydratase - 4.2.1.157 (R)-2-hydroxyisocaproyl-CoA dehydratase - 4.2.1.158 galactarate dehydratase (D-threo-forming) - 4.2.1.159 dTDP-4-dehydro-6-deoxy-alpha-D-glucopyranose 2,3-dehydratase - 4.2.1.16 threonine dehydratase transferred to EC 4.3.1.19 4.2.1.160 2,5-diamino-6-(5-phospho-D-ribosylamino)pyrimidin-4(3H)-one isomerase/dehydratase - 4.2.1.161 bisanhydrobacterioruberin hydratase - 4.2.1.162 6-deoxy-6-sulfo-D-gluconate dehydratase - 4.2.1.163 2-oxo-hept-4-ene-1,7-dioate hydratase - 4.2.1.164 dTDP-4-dehydro-2,6-dideoxy-D-glucose 3-dehydratase - 4.2.1.165 chlorophyllide a 31-hydratase - 4.2.1.166 phosphinomethylmalate isomerase - 4.2.1.167 (R)-2-hydroxyglutaryl-CoA dehydratase - 4.2.1.168 GDP-4-dehydro-6-deoxy-alpha-D-mannose 3-dehydratase - 4.2.1.169 3-vinyl bacteriochlorophyllide d 31-hydratase - 4.2.1.17 enoyl-CoA hydratase - 4.2.1.170 2-(omega-methylthio)alkylmalate dehydratase - 4.2.1.171 cis-L-3-hydroxyproline dehydratase - 4.2.1.172 trans-4-hydroxy-L-proline dehydratase - 4.2.1.173 ent-8alpha-hydroxylabd-13-en-15-yl diphosphate synthase - 4.2.1.174 peregrinol diphosphate synthase - 4.2.1.175 phenyllactyl-CoA dehydratase - 4.2.1.176 L-lyxonate dehydratase - 4.2.1.177 (2S)-3-sulfopropanediol dehydratase - 4.2.1.178 difructose-dianhydride-III synthase - 4.2.1.179 difructose-anhydride-I synthase - 4.2.1.18 methylglutaconyl-CoA hydratase - 4.2.1.180 (E)-benzylidenesuccinyl-CoA hydratase - 4.2.1.19 imidazoleglycerol-phosphate dehydratase - 4.2.1.2 fumarate hydratase - 4.2.1.20 tryptophan synthase - 4.2.1.21 cystathionine beta-synthase deleted, included in EC 4.2.1.22 4.2.1.22 cystathionine beta-synthase - 4.2.1.23 methylcysteine synthase deleted 4.2.1.24 porphobilinogen synthase - 4.2.1.25 L-Arabinonate dehydratase - 4.2.1.26 aminodeoxygluconate dehydratase transferred to EC 4.3.1.21 4.2.1.27 acetylenecarboxylate hydratase - 4.2.1.28 propanediol dehydratase - 4.2.1.29 indoleacetaldoxime dehydratase transferred to EC 4.99.1.6 4.2.1.3 aconitate hydratase - 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 trans-epoxysuccinate hydratase transferred to EC 3.3.2.4 4.2.1.38 erythro-3-hydroxyaspartate dehydratase transferred to EC 4.3.1.20 4.2.1.39 gluconate dehydratase - 4.2.1.4 citrate dehydratase deleted, reaction covered by EC 4.2.1.3, aconitate hydratase 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 - 4.2.1.5 Arabinonate dehydratase - 4.2.1.50 pyrazolylalanine synthase - 4.2.1.51 prephenate dehydratase - 4.2.1.52 dihydrodipicolinate synthase transferred to EC 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 crotonoyl-[acyl-carrier-protein] hydratase deleted, reaction covered by EC 4.2.1.59 4.2.1.59 3-hydroxyacyl-[acyl-carrier-protein] dehydratase - 4.2.1.6 galactonate dehydratase - 4.2.1.60 3-hydroxydecanoyl-[acyl-carrier-protein] dehydratase deleted, reaction covered by EC 4.2.1.59 4.2.1.61 3-hydroxypalmitoyl-[acyl-carrier-protein] dehydratase deleted, reaction covered by EC 4.2.1.59 4.2.1.62 5alpha-Hydroxysteroid dehydratase - 4.2.1.63 epoxide hydratase transferred to EC 3.3.2.3 4.2.1.64 arene-oxide hydratase transferred to EC 3.3.2.3 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 - 4.2.1.7 altronate dehydratase - 4.2.1.70 pseudouridylate synthase - 4.2.1.71 acetylenecarboxylate hydratase deleted, identical to EC 4.2.1.27 4.2.1.72 acetylenedicarboxylate hydratase transferred to EC 4.1.1.78 4.2.1.73 protoaphin-aglucone dehydratase (cyclizing) - 4.2.1.74 medium-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 - 4.2.1.8 mannonate 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-oxalomesaconate hydratase - 4.2.1.84 nitrile hydratase - 4.2.1.85 dimethylmaleate hydratase - 4.2.1.86 16-dehydroprogesterone hydratase deleted, reaction is that of EC 4.2.1.98, 16alpha-hydroxyprogesterone dehydratase 4.2.1.87 octopamine dehydratase - 4.2.1.88 synephrine dehydratase - 4.2.1.89 carnitine dehydratase deleted, activity due to EC 2.8.3.21, L-carnitine CoA-transferase and EC 4.2.1.149, crotonobetainyl-CoA hydratase 4.2.1.9 dihydroxy-acid 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 16alpha-hydroxyprogesterone dehydratase - 4.2.1.99 2-methylisocitrate dehydratase - 4.2.1.B20 onoceroid synthase preliminary BRENDA-supplied EC number 4.2.1.B22 galactarate dehydratase (2-oxo-D-threo-4,5-dihydroadipate) deleted, replaced by EC 4.2.1.158 4.2.1.B26 (R)-2-hydroxyglutaryl-CoA dehydratase deleted, replaced by EC 4.2.1.167 4.2.1.B27 2-nitro-1-(4-nitrophenyl)ethanol synthase preliminary BRENDA-supplied EC number 4.2.1.B28 tetrahymanol synthase (hopene) preliminary BRENDA-supplied EC number 4.2.1.B29 vermelone dehydratase preliminary BRENDA-supplied EC number 4.2.1.B5 omega5(Z)-etheroleic acid synthase preliminary BRENDA-supplied EC number 4.2.1.B6 (11Z)-etheroleic acid synthase preliminary BRENDA-supplied EC number 4.2.1.B7 (8Z)-colneleic acid synthase preliminary BRENDA-supplied EC number 4.2.1.B8 etheroleic acid synthase preliminary BRENDA-supplied EC number 4.2.1.B9 colneleic acid/etheroleic acid synthase preliminary BRENDA-supplied EC number