| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| UDPglucose 4-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Ornithine racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Epimerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Acetoin racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| 2-methyleneglutarate mutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Carboxy-cis,cis-muconate cyclase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Lysine 2,3-aminomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Phosphoacetylglucosamine mutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Glucosamine-6-phosphate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Glucuronate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| DNA topoisomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Mannose-6-phosphate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Corticosteroid side-chain-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Ribulose-phosphate 3-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Glucose-6-phosphate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Bisphosphoglycerate mutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Aldose 1-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Prostacyclin synthase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| D-ornithine 4,5-aminomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Glucose-6-phosphate 1-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Glutamate-1-semialdehyde 2,1-aminomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Phenylalanine racemase (ATP-hydrolysing) | Is a | True | Isomerase | Inferred relationship | Some |  | 
| UDP-N-acetylglucosamine 4-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| L-rhamnose isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Methyl malonyl-CoA epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Methionine racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| DNA topoisomerase (ATP-hydrolysing) | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Tartrate epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| UDPglucuronate 4-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Maleate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| dTDP-4-dehydrorhamnose 3,5-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Isomaltulose synthase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Prostaglandin-H>2< E-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| 2-acetolactate mutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Prostaglandin-A>1< delta-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Chorismate mutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino]imidazole-4-carboxamide isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Hydroperoxide isomerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Aconitate delta-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Thromboxane synthase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| 3-hydroxybutyryl-CoA epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Arginine racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Glutamate racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Thiocyanate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Hydroxypyruvate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Chalcone isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Arabinose-5-phosphate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Linoleate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Leucine 2,3-aminomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| UDPglucosamine 4-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Lanosterol synthase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Muconolactone delta-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Retinal isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Geranyl-diphosphate cyclase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| 3-carboxy-cis,cis-muconate cycloisomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| UDP-N-acetylglucosamine 2-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Methylmalonyl-CoA mutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Lysine 5,6-aminomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Methylitaconate delta-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Furylfuramide isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Oxaloacetate tautomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| D-lyxose ketol-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Maleylpyruvate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Isopentenyl-diphosphate delta-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Ribose isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Phosphoglycerate mutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Phosphoglucomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| L-Ribulose-phosphate 4-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Lysine racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Phosphopentomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Amino-acid racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| 16-hydroxysteroid epimerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| CDPabequose epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Vinylacetyl-CoA delta-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Lysolecithin acylmutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| 4-hydroxyproline epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| N-Acylglucosamine-6-phosphate 2-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Tyrosine 2,3-aminomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Beta-lysine 5,6-aminomutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| UDParabinose 4-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Isocitrate epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Muconate cycloisomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Mandelate racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| UDPglucuronate 5'-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| 4-deoxy-L-threo-5-hexosulose-uronate ketol-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Aspartate racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Protein disulfide-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Phosphoglucomutase (glucose-cofactor) | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Triose-phosphate isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| N-Acylglucosamine 2-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Cellobiose epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Dodecenoyl -CoA delta-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| myo-Inositol-1-phosphate synthase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Cycloartenol synthase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Tetrahydroxypteridine cycloisomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| UDPgalactopyranose mutase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Cholestenol delta-isomerase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Proline racemase | Is a | True | Isomerase | Inferred relationship | Some |  | 
| Heparosan-N-sulfate-glucuronate 5-epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Diaminopimelate epimerase | Is a | False | Isomerase | Inferred relationship | Some |  | 
| Chloromuconate cycloisomerase | Is a | True | Isomerase | Inferred relationship | Some |  |