This list contains a list of EC numbers for the fifth group, EC 5, isomerases, placed in numerical order as determined by the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology. All official information is tabulated at the website of the committee. The database is developed and maintained by Andrew McDonald. EC 5.1: Epimerases and racemases EC 5.1.1: Acting on Amino acids and Derivatives : alanine racemase : methionine racemase : glutamate racemase : proline racemase : lysine racemase : threonine racemase : diaminopimelate epimerase : 4-hydroxyproline epimerase : arginine racemase : amino-acid racemase : phenylalanine racemase (ATP-hydrolysing) : ornithine racemase : aspartate racemase : nocardicin-A epimerase : 2-aminohexano-6-lactam racemase : protein-serine epimerase : isopenicillin-N epimerase : serine racemase : L-Ala-D/L-Glu epimerase * : isoleucine 2-epimerase * : 4-hydroxyproline betaine 2-epimerase * : UDP-N-acetyl-α-D-muramoyl-L-alanyl-L-glutamate epimerase * : histidine racemase * *No Wikipedia article EC 5.1.2: Acting on Hydroxy acids and Derivatives : lactate racemase : mandelate racemase : 3-hydroxybutyryl-CoA epimerase : acetoin racemase : tartrate epimerase : isocitrate epimerase : tagaturonate epimerase * *No Wikipedia article EC 5.1.3: Acting on Carbohydrates and Derivatives : ribulose-phosphate 3-epimerase : UDP-glucose 4-epimerase : aldose 1-epimerase : L-ribulose-5-phosphate 4-epimerase : UDP-arabinose 4-epimerase : UDP-glucuronate 4-epimerase : UDP-N-acetylglucosamine 4-epimerase : N-acylglucosamine 2-epimerase : N-acylglucosamine-6-phosphate 2-epimerase : CDP-paratose 2-epimerase : cellobiose epimerase : The enzyme has never been purified and the activity was later shown not to exist : dTDP-4-dehydrorhamnose 3,5-epimerase : UDP-N-acetylglucosamine 2-epimerase (non-hydrolysing) : glucose-6-phosphate 1-epimerase : UDP-glucosamine 4-epimerase : heparosan-N-sulfate-glucuronate 5-epimerase : GDP-mannose 3,5-epimerase : chondroitin-glucuronate 5-epimerase : ADP-glyceromanno-heptose 6-epimeras : maltose epimerase : L-ribulose-5-phosphate 3-epimerase : UDP-2,3-diacetamido-2,3-dideoxyglucuronic acid 2-epimerase : N-acetylneuraminate epimerase : dTDP-L-rhamnose 4-epimerase : N-acetyl-α-D-glucosaminyl-diphospho-ditrans,octacis-undecaprenol 4-epimerase * : dTDP-4-dehydro-6-deoxy-D-glucose 3-epimerase * : UDP-N-acetyl-L-fucosamine synthase * : L-fucose mutarotase * : D-psicose 3-epimerase * : D-tagatose 3-epimerase * : L-rhamnose mutarotase * : 2-epi-5-epi-valiolone epimerase * : monoglucosyldiacylglycerol epimerase * : 2-epi-5-epi-valiolone 7-phosphate 2-epimerase * : heparosan-glucuronate 5-epimerase * : mannuronan 5-epimerase * : D-erythrulose 1-phosphate 3-epimerase * : L-erythrulose 4-phosphate epimerase. The activity has been shown not to take place. * : D-tagatose 6-phosphate 4-epimerase * : fructoselysine 3-epimerase * : D-glucosamine-6-phosphate 4-epimerase * : sulfoquinovose mutarotase * : mannose 2-epimerase * *No Wikipedia article EC 5.1.99: Acting on Other Compounds : methylmalonyl-CoA epimerase : 16-hydroxysteroid epimerase : allantoin racemase : α-methylacyl-CoA racemase : hydantoin racemase : NAD(P)H-hydrate epimerase : dihydroneopterin triphosphate 2′-epimerase * : 7,8-dihydroneopterin epimerase